[java]
/**
* Mouse 2D.
* Processing Example
* Comments by Tony Targonski
*/

// initialize the environment
void setup()
{
// window size
size(200, 200);
// do not outline shapes
noStroke();
// RGB colour mode, 255 max colour, 100 max alpha
colorMode(RGB, 255, 255, 255, 100);
// draw Rectangles from the center, not (default) corner
rectMode(CENTER);
// set framerate to 30 FPS
frameRate(30);
}

// draw frame. Called once during each loop iteration
void draw()
{
// clear the background with 51/255 grey
background(51);
// set drawing colour to 255/255 grey, 80/100 alpha
fill(255, 80);
// draw two rectangles
rect(mouseX, height/2, mouseY/2+10, mouseY/2+10);
rect(width-mouseX, height/2, ((height-mouseY)/2)+10, ((height-mouseY)/2)+10);
}
[/java]