Screen 13
'Move to (50,50) without drawing
Draw "BM 50,50"
'Set drawing color to 2 (green)
Draw "C2"
'Draw a box
Draw "R50 D30 L50 U30"
'Move inside the box
Draw "BM +1,1"
'Flood fill with color 1 (blue) up to border color 2
Draw "P 1,2"
Sleep