Processing interativo

Fiz um processing interativo bem simples, fui colocando mouseX e mouseY em tudo! haha eu achei q deu um efeito legal:
void setup() {
size(400, 400);
smooth();
fill(0, 102);
}
void draw() {
fill(mouseX,mouseY,mouseY, 10);
ellipse(mouseX , mouseY, mouseX , mouseY);
fill(mouseX,0,mouseY, 10);
ellipse(mouseX, mouseY, mouseY, mouseX);
}