experiment

Hello Guys,

I need to make a video with this toolbox, where a moving ball is moving from left to the right side of the screen.

could you please give me some suggestions of how I can do this?

Also, for this , I am using this type of command:
Screen('Filloval',wPtr,[0 255 0], [ 340 280 600 500]);

is there any way I can add some color effect (like color gradient) to this, so that a 2D circle would look like a 3D ball?

Thanks alot
shabnam