Mouse drag Space key: afterimage Video https://youtu.be/rqALTO8a6Y0
You will surely stir round and round. Transparent color set. 0xFFFF000000 = -16777216 -16777216 * 255 = -4278190080 (100% Transparent color) -4278190080 / 100 = -42781900.8 0-100 = alpha value
