void setup()
{
size(250, 250);
background(150);
rectMode(CENTER_DIAMETER);
ellipseMode(CENTER_DIAMETER);
}

void loop() 
{

noStroke();
fill(mouseY,mouseX,mouseX);
ellipse(mouseX, mouseY, 100, 100);

noStroke();
fill(mouseY,mouseX,mouseX);
ellipse(- mouseX + 250, - mouseY + 250, 100, 100);

noStroke();
fill(mouseY,mouseX,mouseX);
ellipse(-mouseX + 250, mouseY, 100, 100);

noStroke();
fill(mouseY,mouseX,mouseX);
ellipse(mouseX, - mouseY + 250, 100, 100);

noStroke();
fill(0,mouseY,0);
rect(50, 50, 10, 10);
fill(0,0,mouseX);
rect(50, 50, 50, 50);

noStroke();
fill(0,mouseX,50);
rect(100, 100, 50, 50
);
fill(0,0,mouseX);
rect(50, 50, 50, 50);

noStroke();
fill(0,mouseY,0);
rect(150, 100, 50, 50
);
fill(30,0,mouseX);
rect(50, 50, 50, 50);

noStroke();
fill(mouseY,200,0);
rect(150, 150, 50, 50
);
fill(140,0,mouseX);
rect(50, 50, 50, 50);

noStroke();
fill(mouseY,mouseY,0);
rect(100, 150, 50, 50
);
fill(mouseY,0,70);
rect(50, 50, 50, 50);

noStroke();
fill(100,mouseX,0);
rect(200, 200, 50, 50
);
fill(0,mouseY + 50,mouseX);
rect(50, 50, 50, 50);

noStroke();
fill(0,120,mouseX);
rect(200, 50, 50, 50);

noStroke();
fill(mouseX,255,mouseY);
rect( 50, 200, 50, 50);

}