diff --git a/src/element.py b/src/element.py
new file mode 100644
index 0000000..f356c5a
--- /dev/null
+++ b/src/element.py
@@ -0,0 +1,164 @@
+## elements that polyominoes are made of
+import math
+import sys
+
+from point import Point,l_infinity
+from tools import isint_nonzero,sgn,in_interval
+
+# parent class of all elements
+class Element():
+    def __init__(self,x,y,size,**kwargs):
+        self.pos=Point(x,y)
+        self.size=size
+
+    # set position
+    def setpos(self,x,y):
+        self.pos.x=x
+        self.pos.y=y
+
+
+    # override in each subclass
+    # check whether an element interacts with square
+    def check_interaction(self,element):
+        return False
+
+    # override in each subclass
+    # whether x is in the support of the element
+    def in_support(self,x):
+        return False
+
+    # override in each subclass
+    # check whether an element is touching self
+    def check_touch(self,element):
+        return False
+
+    # override in each subclass
+    # find position along a line that comes in contact with the line going through element.pos in direction v
+    def move_on_line_to_stick(self,element,v):
+        return Point(0,0)
+
+    # override in each subclass
+    # move along edge of element
+    def move_along(self,delta,element):
+        return element
+
+
+# square elements
+class Element_square(Element):
+
+    # check whether an element interacts with square
+    def check_interaction(self,element):
+        # allow for error
+        return l_infinity(element.pos-self.pos)<(self.size+element.size)/2-1e-11
+
+    # whether x is in the support of the element
+    def in_support(self,x):
+        return l_infinity(self.pos-x)<=1/2
+
+    # check whether an element is touching self
+    def check_touch(self,element):
+        # allow for error
+        if in_interval(l_infinity(element.pos-self.pos),(self.size+element.size)/2-1e-11,(self.size+element.size)/2+1e-11):
+                return True
+        return False
+
+    # find position along a line that comes in contact with the line going through element.pos in direction v
+    def move_on_line_to_stick(self,element,v):
+        # compute intersections with four lines making up square
+        if v.x!=0:
+            if v.y!=0:
+                intersections=[\
+                Point(self.pos.x+(self.size+element.size)/2,element.pos.y+v.y/v.x*(self.pos.x+(self.size+element.size)/2-element.pos.x)),\
+                Point(self.pos.x-(self.size+element.size)/2,element.pos.y+v.y/v.x*(self.pos.x-(self.size+element.size)/2-element.pos.x)),\
+                Point(element.pos.x+v.x/v.y*(self.pos.y+(self.size+element.size)/2-element.pos.y),self.pos.y+(self.size+element.size)/2),\
+                Point(element.pos.x+v.x/v.y*(self.pos.y-(self.size+element.size)/2-element.pos.y),self.pos.y-(self.size+element.size)/2)\
+                ]
+            else:
+                intersections=[\
+                Point(self.pos.x+(self.size+element.size)/2,element.pos.y+v.y/v.x*(self.pos.x+(self.size+element.size)/2-element.pos.x)),\
+                Point(self.pos.x-(self.size+element.size)/2,element.pos.y+v.y/v.x*(self.pos.x-(self.size+element.size)/2-element.pos.x))
+                ]
+        else:
+            if v.y!=0:
+                intersections=[\
+                Point(element.pos.x+v.x/v.y*(self.pos.y+(self.size+element.size)/2-element.pos.y),self.pos.y+(self.size+element.size)/2),\
+                Point(element.pos.x+v.x/v.y*(self.pos.y-(self.size+element.size)/2-element.pos.y),self.pos.y-(self.size+element.size)/2)\
+                ]
+            else:
+                print("error: move_on_line_to_stick called with v=0, please file a bug report with the developer",file=sys.stderr)
+                exit(-1)
+
+        # compute closest one, on square
+        closest=None
+        dist=math.inf
+        for i in range(0,len(intersections)):
+            # check that it is on square
+            if abs(intersections[i].x-self.pos.x)<=(self.size+element.size)/2+1e-11 and abs(intersections[i].y-self.pos.y)<=(self.size+element.size)/2+1e-11:
+                if (intersections[i]-element.pos)**2<dist:
+                    closest=intersections[i]
+                    dist=(intersections[i]-element.pos)**2
+
+        if closest==None:
+            print("error: cannot move particle at (",pos.x,",",pos.y,") to the boundary of (",self.pos.x,",",self.pos.y,") in direction (",v.x,",",v.y,")",file=sys.stderr)
+            exit(-1)
+
+        # return difference to pos
+        return closest-element.pos
+
+    # move along edge of square
+    def move_along(self,delta,element):
+        rel=element.pos-self.pos
+        # check if the particle is stuck in the x direction
+        if isint_nonzero(rel.x/((self.size+element.size)/2)):
+            # check y direction
+            if isint_nonzero(rel.y/((self.size+element.size)/2)):
+                # in corner
+                if sgn(delta.y)==-sgn(rel.y):
+                    # stuck in x direction
+                    return self.move_stuck_x(delta,element)
+                elif sgn(delta.x)==-sgn(rel.x):
+                    # stuck in y direction
+                    return self.move_stuck_y(delta,element)
+                # stuck in both directions
+                return element.pos
+            else:
+                # stuck in x direction
+                return self.move_stuck_x(delta,element)
+        elif isint_nonzero(rel.y/((self.size+element.size)/2)):
+            # stuck in y direction
+            return self.move_stuck_y(delta,element)
+        # this should never happen
+        else:
+            print("error: stuck particle has non-integer relative position: (",rel.x,",",rel.y,")",file=sys.stderr)
+            exit(-1)
+    # move when stuck in the x direction
+    def move_stuck_x(self,delta,element):
+        # only move in y direction
+        candidate=Point(0,delta.y)
+        # do not move past corners
+        rel=element.pos.y-self.pos.y
+        if delta.y>0:
+            if rel<math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)-1e-11 and delta.y+rel>math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+1e-11 and math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)!=0:
+                # stick to corner
+                candidate.y=math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+self.pos.y-element.pos.y
+        else:
+            if rel>math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+1e-11 and delta.y+rel<math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)-1e-11 and math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)!=0:
+                # stick to corner
+                candidate.y=math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+self.pos.y-element.pos.y
+        return candidate
+    # move when stuck in the y direction
+    def move_stuck_y(self,delta,element):
+        # onlx move in x direction
+        candidate=Point(delta.x,0)
+        # do not move past corners
+        rel=element.pos.x-self.pos.x
+        if delta.x>0:
+            if rel<math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)-1e-11 and delta.x+rel>math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+1e-11 and math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)!=0:
+                # stick to corner
+                candidate.x=math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+self.pos.x-element.pos.x
+        else:
+            if rel>math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+1e-11 and delta.x+rel<math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)-1e-11 and math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)!=0:
+                # stick to corner
+                candidate.x=math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+self.pos.x-element.pos.x
+        return candidate
+
diff --git a/src/painter.py b/src/painter.py
index 7bf3483..8a48706 100644
--- a/src/painter.py
+++ b/src/painter.py
@@ -6,7 +6,6 @@ from kivy.graphics import Color,Line
 
 from point import Point
 from polyomino import Cross
-from polyomino import Square_element
 
 from tools import remove_fromlist
 
@@ -71,7 +70,7 @@ class Painter(Widget):
 
         # snap all existing particles to grid
         for particle in self.particles:
-            delta=self.lattice.nearest_delta(particle.squares[0].pos)
+            delta=self.lattice.nearest_delta(particle.elements[0].pos)
             if not self.check_interaction_any(particle,delta):
                 particle.move(delta)
 
@@ -104,7 +103,7 @@ class Painter(Widget):
             # draw grids
             for particle in self.particles:
                 if particle.grid>0:
-                    self.draw_grid(particle.squares[0].pos,particle.grid)
+                    self.draw_grid(particle.elements[0].pos,particle.grid)
 
             for particle in self.particles:
                 particle.draw(self,alpha=0.5)
@@ -217,7 +216,7 @@ class Painter(Widget):
                 new=Cross(touchx,touchy)
                 # snap to lattice
                 if self.lattice!=None:
-                    new.move(self.lattice.nearest_delta(new.squares[0].pos))
+                    new.move(self.lattice.nearest_delta(new.elements[0].pos))
 
                 if not self.check_interaction_any(new,Point(0,0)):
                     # add to list
@@ -238,7 +237,7 @@ class Painter(Widget):
 
                 # record relative position of click with respect to reference
                 if self.undermouse!=None:
-                    self.offset=Point(touchx,touchy)-self.undermouse.squares[0].pos
+                    self.offset=Point(touchx,touchy)-self.undermouse.elements[0].pos
 
                 # no modifiers
                 if self.modifiers==[]:
@@ -291,7 +290,7 @@ class Painter(Widget):
             # only move on left click
             if touch.button=="left" and self.modifiers==[] and self.undermouse!=None:
                 # attempted move determined by the relative position to the relative position of click within self.undermouse
-                delta=self.adjust_move(Point(touchx,touchy)-(self.offset+self.undermouse.squares[0].pos),0)
+                delta=self.adjust_move(Point(touchx,touchy)-(self.offset+self.undermouse.elements[0].pos),0)
 
                 # snap to lattice
                 if self.lattice!=None:
@@ -347,10 +346,10 @@ class Painter(Widget):
     # check whether a candidate particle element with any of the unselected particles
     def check_interaction_unselected_element(self,element,offset):
         for particle in self.unselected:
-            for square in particle.squares:
+            for elt in particle.elements:
                 # add offset
                 element.pos+=offset
-                if square.check_interaction(element):
+                if elt.check_interaction(element):
                     # reset offset
                     element.pos-=offset
                     return True
@@ -365,7 +364,7 @@ class Painter(Widget):
         # actual_delta is the smallest (componentwise) of all the computed delta's
         actual_delta=Point(math.inf,math.inf)
         for particle in self.selected:
-            for element in particle.squares:
+            for element in particle.elements:
                 # compute adjustment move due to unselected obstacles
                 adjusted_delta=self.adjust_move_element(delta,element,0)
                 # only keep the smallest delta's (in absolute value)
@@ -391,7 +390,7 @@ class Painter(Widget):
         # whether newpos is acceptable
         accept_newpos=True
         for other in self.unselected:
-            for obstacle in other.squares:
+            for obstacle in other.elements:
                 # move would make element overlap with obstacle
                 element.pos+=delta
                 if obstacle.check_interaction(element):
@@ -448,7 +447,7 @@ class Painter(Widget):
         for particle in self.particles:
             if type(particle)==Cross:
                 ff.write("{:d};".format(CROSS_INDEX))
-            ff.write("{:05.2f},{:05.2f};{:3.1f},{:3.1f},{:3.1f}\n".format(particle.squares[0].pos.x,particle.squares[0].pos.y,particle.color[0],particle.color[1],particle.color[2]))
+            ff.write("{:05.2f},{:05.2f};{:3.1f},{:3.1f},{:3.1f}\n".format(particle.elements[0].pos.x,particle.elements[0].pos.y,particle.color[0],particle.color[1],particle.color[2]))
         ff.close()
 
     # read configuration from file
@@ -561,7 +560,7 @@ class Painter(Widget):
         for particle in self.particles:
             if type(particle)==Cross:
                 ff.write("\cross{"+colors.closest_color(particle.color,colors.xcolor_names)+"}")
-            ff.write("{{({:05.2f},{:05.2f})}};\n".format(particle.squares[0].pos.x-self.particles[0].squares[0].pos.x,particle.squares[0].pos.y-self.particles[0].squares[0].pos.y))
+            ff.write("{{({:05.2f},{:05.2f})}};\n".format(particle.elements[0].pos.x-self.particles[0].elements[0].pos.x,particle.elements[0].pos.y-self.particles[0].elements[0].pos.y))
 
         ff.write("\\end{tikzpicture}\n")
         ff.write("\\end{document}\n")
diff --git a/src/polyomino.py b/src/polyomino.py
index 71ece63..2d5c550 100644
--- a/src/polyomino.py
+++ b/src/polyomino.py
@@ -1,15 +1,14 @@
-import math
-import sys
+# a polyomino is a collection of elements, defined in elements.py
 from kivy.graphics import Color,Line,Rectangle
 
-from point import Point,l_infinity
-from tools import isint_nonzero,sgn,in_interval
+from point import l_infinity
+from element import Element_square
 
 # parent class of all polyominos
 class Polyomino():
     def __init__(self,**kwargs):
-        # square elements that make up the polyomino 
-        self.squares=kwargs.get("squares",[])
+        # elements that make up the polyomino 
+        self.elements=kwargs.get("elements",[])
 
         self.color=kwargs.get("color",(0,0,1))
         self.selected=False
@@ -28,8 +27,8 @@ class Polyomino():
             # darken selected
             Color(r/2,g/2,b/2,alpha)
 
-        for square in self.squares:
-            Rectangle(pos=(painter.pos_tocoord_x(square.pos.x-0.5*square.size),painter.pos_tocoord_y(square.pos.y-0.5*square.size)),size=(square.size*painter.base_size,square.size*painter.base_size))
+        for element in self.elements:
+            Rectangle(pos=(painter.pos_tocoord_x(element.pos.x-0.5*element.size),painter.pos_tocoord_y(element.pos.y-0.5*element.size)),size=(element.size*painter.base_size,element.size*painter.base_size))
 
         # draw boundary
         self.stroke(painter)
@@ -42,62 +41,62 @@ class Polyomino():
 
         # white
         Color(1,1,1)
-        for square in self.squares:
+        for element in self.elements:
             Line(points=(
-            *(coordx-0.5*square.size*painter.base_size,coordy-0.5*square.size*painter.base_size),
-            *(coordx-0.5*square.size*painter.base_size,coordy+0.5*square.size*painter.base_size),
-            *(coordx+0.5*square.size*painter.base_size,coordy+0.5*square.size*painter.base_size),
-            *(coordx+0.5*square.size*painter.base_size,coordy-0.5*square.size*painter.base_size),
-            *(coordx-0.5*square.size*painter.base_size,coordy-0.5*square.size*painter.base_size)
+            *(coordx-0.5*element.size*painter.base_size,coordy-0.5*element.size*painter.base_size),
+            *(coordx-0.5*element.size*painter.base_size,coordy+0.5*element.size*painter.base_size),
+            *(coordx+0.5*element.size*painter.base_size,coordy+0.5*element.size*painter.base_size),
+            *(coordx+0.5*element.size*painter.base_size,coordy-0.5*element.size*painter.base_size),
+            *(coordx-0.5*element.size*painter.base_size,coordy-0.5*element.size*painter.base_size)
             ))
 
     # move by delta
     def move(self,delta):
-        for square in self.squares:
-            square.pos+=delta
+        for element in self.elements:
+            element.pos+=delta
 
     # whether x is in the support of the polyomino
     def in_support(self,x):
-        for square in self.squares:
-            if l_infinity(square.pos-x)<=1/2:
+        for element in self.elements:
+            if element.in_support(x):
                 return True
         return False
 
     # check whether self interacts with candidate if candidate were moved by offset
     def check_interaction(self,candidate,offset):
-        for square1 in self.squares:
-            for square2 in candidate.squares:
+        for element1 in self.elements:
+            for element2 in candidate.elements:
                 # add offset
-                square2.pos+=offset
-                if square1.check_interaction(square2):
+                element2.pos+=offset
+                if element1.check_interaction(element2):
                     # reset offset
-                    square2.pos-=offset
+                    element2.pos-=offset
                     return True
                 # reset offset
-                square2.pos-=offset
+                element2.pos-=offset
         return False
 
 # square
 class Square(Polyomino):
     def __init__(self,x,y,**kwargs):
-        super(Square,self).__init__(**kwargs,squares=[Square_element(x,y,size=kwargs.get("size",1.0))])
+        super(Square,self).__init__(**kwargs,elements=[Element_square(x,y,size=kwargs.get("size",1.0))])
 
 # cross
 class Cross(Polyomino):
     def __init__(self,x,y,**kwargs):
-        super(Cross,self).__init__(**kwargs,squares=[\
-        Square_element(x,y,1),\
-        Square_element(x+1,y,1),\
-        Square_element(x-1,y,1),\
-        Square_element(x,y+1,1),\
-        Square_element(x,y-1,1)\
+        super(Cross,self).__init__(**kwargs,elements=[\
+        Element_square(x,y,1),\
+        Element_square(x+1,y,1),\
+        Element_square(x-1,y,1),\
+        Element_square(x,y+1,1),\
+        Element_square(x,y-1,1)\
         ])
 
-    # redefine stroke to avoid lines between touching squares
+    # redefine stroke to avoid lines between touching elements
     def stroke(self,painter):
         # convert to graphical coordinates
-        coordx=painter.pos_tocoord_x(self.squares[0].pos.x)
-        coordy=painter.pos_tocoord_y(self.squares[0].pos.y)
+        coordx=painter.pos_tocoord_x(self.elements[0].pos.x)
+        coordy=painter.pos_tocoord_y(self.elements[0].pos.y)
 
         Color(1,1,1)
         Line(points=(
@@ -116,130 +115,3 @@ class Cross(Polyomino):
         *(coordx-0.5*painter.base_size,coordy-0.5*painter.base_size),
         ))
 
-
-
-# square building block of polyominos
-class Square_element():
-
-    def __init__(self,x,y,size,**kwargs):
-        self.pos=Point(x,y)
-        self.size=size
-
-    # set position
-    def setpos(self,x,y):
-        self.pos.x=x
-        self.pos.y=y
-
-
-    # check whether an element interacts with square
-    def check_interaction(self,element):
-        # allow for error
-        return l_infinity(element.pos-self.pos)<(self.size+element.size)/2-1e-11
-
-    # check whether an element is touching self
-    def check_touch(self,element):
-        # allow for error
-        if in_interval(l_infinity(element.pos-self.pos),(self.size+element.size)/2-1e-11,(self.size+element.size)/2+1e-11):
-                return True
-        return False
-
-    # find position along a line that comes in contact with the line going through element.pos in direction v
-    def move_on_line_to_stick(self,element,v):
-        # compute intersections with four lines making up square
-        if v.x!=0:
-            if v.y!=0:
-                intersections=[\
-                Point(self.pos.x+(self.size+element.size)/2,element.pos.y+v.y/v.x*(self.pos.x+(self.size+element.size)/2-element.pos.x)),\
-                Point(self.pos.x-(self.size+element.size)/2,element.pos.y+v.y/v.x*(self.pos.x-(self.size+element.size)/2-element.pos.x)),\
-                Point(element.pos.x+v.x/v.y*(self.pos.y+(self.size+element.size)/2-element.pos.y),self.pos.y+(self.size+element.size)/2),\
-                Point(element.pos.x+v.x/v.y*(self.pos.y-(self.size+element.size)/2-element.pos.y),self.pos.y-(self.size+element.size)/2)\
-                ]
-            else:
-                intersections=[\
-                Point(self.pos.x+(self.size+element.size)/2,element.pos.y+v.y/v.x*(self.pos.x+(self.size+element.size)/2-element.pos.x)),\
-                Point(self.pos.x-(self.size+element.size)/2,element.pos.y+v.y/v.x*(self.pos.x-(self.size+element.size)/2-element.pos.x))
-                ]
-        else:
-            if v.y!=0:
-                intersections=[\
-                Point(element.pos.x+v.x/v.y*(self.pos.y+(self.size+element.size)/2-element.pos.y),self.pos.y+(self.size+element.size)/2),\
-                Point(element.pos.x+v.x/v.y*(self.pos.y-(self.size+element.size)/2-element.pos.y),self.pos.y-(self.size+element.size)/2)\
-                ]
-            else:
-                print("error: move_on_line_to_stick called with v=0, please file a bug report with the developer",file=sys.stderr)
-                exit(-1)
-
-        # compute closest one, on square
-        closest=None
-        dist=math.inf
-        for i in range(0,len(intersections)):
-            # check that it is on square
-            if abs(intersections[i].x-self.pos.x)<=(self.size+element.size)/2+1e-11 and abs(intersections[i].y-self.pos.y)<=(self.size+element.size)/2+1e-11:
-                if (intersections[i]-element.pos)**2<dist:
-                    closest=intersections[i]
-                    dist=(intersections[i]-element.pos)**2
-
-        if closest==None:
-            print("error: cannot move particle at (",pos.x,",",pos.y,") to the boundary of (",self.pos.x,",",self.pos.y,") in direction (",v.x,",",v.y,")",file=sys.stderr)
-            exit(-1)
-
-        # return difference to pos
-        return closest-element.pos
-
-    # move along edge of square
-    def move_along(self,delta,element):
-        rel=element.pos-self.pos
-        # check if the particle is stuck in the x direction
-        if isint_nonzero(rel.x/((self.size+element.size)/2)):
-            # check y direction
-            if isint_nonzero(rel.y/((self.size+element.size)/2)):
-                # in corner
-                if sgn(delta.y)==-sgn(rel.y):
-                    # stuck in x direction
-                    return self.move_stuck_x(delta,element)
-                elif sgn(delta.x)==-sgn(rel.x):
-                    # stuck in y direction
-                    return self.move_stuck_y(delta,element)
-                # stuck in both directions
-                return element.pos
-            else:
-                # stuck in x direction
-                return self.move_stuck_x(delta,element)
-        elif isint_nonzero(rel.y/((self.size+element.size)/2)):
-            # stuck in y direction
-            return self.move_stuck_y(delta,element)
-        # this should never happen
-        else:
-            print("error: stuck particle has non-integer relative position: (",rel.x,",",rel.y,")",file=sys.stderr)
-            exit(-1)
-    # move when stuck in the x direction
-    def move_stuck_x(self,delta,element):
-        # only move in y direction
-        candidate=Point(0,delta.y)
-        # do not move past corners
-        rel=element.pos.y-self.pos.y
-        if delta.y>0:
-            if rel<math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)-1e-11 and delta.y+rel>math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+1e-11 and math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)!=0:
-                # stick to corner
-                candidate.y=math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+self.pos.y-element.pos.y
-        else:
-            if rel>math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+1e-11 and delta.y+rel<math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)-1e-11 and math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)!=0:
-                # stick to corner
-                candidate.y=math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+self.pos.y-element.pos.y
-        return candidate
-    # move when stuck in the y direction
-    def move_stuck_y(self,delta,element):
-        # onlx move in x direction
-        candidate=Point(delta.x,0)
-        # do not move past corners
-        rel=element.pos.x-self.pos.x
-        if delta.x>0:
-            if rel<math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)-1e-11 and delta.x+rel>math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+1e-11 and math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)!=0:
-                # stick to corner
-                candidate.x=math.ceil(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+self.pos.x-element.pos.x
-        else:
-            if rel>math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+1e-11 and delta.x+rel<math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)-1e-11 and math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)!=0:
-                # stick to corner
-                candidate.x=math.floor(rel/((self.size+element.size)/2))*((self.size+element.size)/2)+self.pos.x-element.pos.x
-        return candidate
-
diff --git a/src/status_bar.py b/src/status_bar.py
index 455f73f..7755574 100644
--- a/src/status_bar.py
+++ b/src/status_bar.py
@@ -45,9 +45,9 @@ class Status_bar(Label):
             spaces=int(self.width/self.char_width)-len(self.raw_text)-13
             if spaces>0:
                 if self.app.painter.reference==None:
-                    self.raw_text+=" "*spaces+"({:05.2f},{:05.2f})\n".format(self.app.painter.selected[0].squares[0].pos.x,self.app.painter.selected[0].squares[0].pos.y)
+                    self.raw_text+=" "*spaces+"({:05.2f},{:05.2f})\n".format(self.app.painter.selected[0].elements[0].pos.x,self.app.painter.selected[0].elements[0].pos.y)
                 else:
-                    self.raw_text+=" "*spaces+"({:05.2f},{:05.2f})\n".format(self.app.painter.selected[0].squares[0].pos.x-self.app.painter.reference.squares[0].pos.x,self.app.painter.selected[0].squares[0].pos.y-self.app.painter.reference.squares[0].pos.y)
+                    self.raw_text+=" "*spaces+"({:05.2f},{:05.2f})\n".format(self.app.painter.selected[0].elements[0].pos.x-self.app.painter.reference.elements[0].pos.x,self.app.painter.selected[0].elements[0].pos.y-self.app.painter.reference.elements[0].pos.y)
 
         # do not wrap
         self.text=self.raw_text[:min(len(self.raw_text),int(self.width/self.char_width))]