code: def createHorizonPolygons(self):
          '''Creates the two polygons to show the sky and ground.'''
          # Sky Polygon
          vertsTop = [[-1,0],[-1,1],[1,1],[1,0],[-1,0]]
          self.topPolygon = Polygon(vertsTop,facecolor='dodgerblue',edgecolor='none')
          self.axes.add_patch(self.topPolygon)
          # Ground Polygon
          vertsBot = [[-1,0],[-1,-1],[1,-1],[1,0],[-1,0]]
          self.botPolygon = Polygon(vertsBot,facecolor='brown',edgecolor='none')
          self.axes.add_patch(self.botPolygonf createHorizonPolygons(self):
          '''Creates the two polygons to show the sky and ground.'''
          # Sky Polygon
          vertsTop = [[-1,0],[-1,1],[1,1],[1,0],[-1,0]]
          self.topPolygon = Polygon(vertsTop,facecolor='dodgerblue',edgecolor='none')
          self.axes.add_patch(self.topPolygon)
          # Ground Polygon
          vertsBot = [[-1,0],[-1,-1],[1,-1],[1,0],[-1,0]]
          self.botPolygon = Polygon(vertsBot,facecolor='brown',edgecolor='none')
          self.axes.add_patch(self.botPolygon)
docs: Creates the two polygons to show the sky and ground.