window 600 600
rectangle 300 300 500 100
rectangle 300 300 100 500 
circle 150 150 80 black
circle 450 150 80 black
circle 150 450 80 black
circle 450 450 80 black
filled_circle 150 150 60 black blue
filled_circle 450 150 60 black green
filled_circle 150 450 60 black red
filled_circle 450 450 60 black yellow