app.background $=$ 'cornflowerBlue'

Line$(200,0,200,400,$ fill$=$'silver', lineWidth$=400,$ opacity$=30,$ dashes$=(1,20))$

Line$(0,200,400,200,$ fill$=$'silver', lineWidth$=400,$ opacity$=30,$ dashes$=(1,20))$

# divider

Line$(200,0,200,400,$ fill$=$'white', dashes$=$True$)$

# left polygon

greenPolygon $=$ Polygon$($fill$=$'lightGreen', border$=$'black'$)$

# right polygon

pinkPolygon $=$ Polygon$($fill$=$'pink', border$=$'black'$)$

def onMousePress$($mouseX$,$ mouseY$)$:

# When the mouse is clicked on the left side, add a point to the green

# polygon. Also, add a reflecting point to the pink polygon.

### Place Your Code Here ###

pass