Follow the bouncing ball

Hypnotize yourself. Description of applet parameters:

ballsize - size of ball in pixels
xinc - number of pixels to translate ball position per iteration
ballr - red value of ball (0-255)
ballg - green value of ball (0-255)
ballb - blue value of ball (0-255)
backr - red value of background (0-255)
backg - green value of background (0-255)
backb - blue value of background (0-255)
randomcolors - change the ball to a random color at every timeslize (true |false)
overlay - overlay previous ball with background color. (true | false)

Right now, I've set overlay to false and randomcolors to true.