def round_corner(radius, fill):
corner = Image.new('<STR_LIT:L>', (radius, radius), <NUM_LIT:0>)  <EOL>draw = ImageDraw.Draw(corner)<EOL>draw.pieslice((<NUM_LIT:0>, <NUM_LIT:0>, radius * <NUM_LIT:2>, radius * <NUM_LIT:2>), <NUM_LIT>, <NUM_LIT>, fill=fill)<EOL>return corner<EOL>
Draw a round corner