// Dartmouth CS 2, Winter 2009, Chris Bailey-Kellogg
// Notes 4 | Sketch 1

void setup()
{
  size(400,400);
  smooth();
  noStroke();
  frameRate(30);
  background(0);
}

void draw()
{
  fill(0,10);
  rect(0,0,width,height);
  fill(255);
  ellipse(mouseX,mouseY,30,30);
  // Mirror it:
  ellipse(width-mouseX,mouseY,30,30);
  ellipse(mouseX,height-mouseY,30,30);
  ellipse(width-mouseX,height-mouseY,30,30);
}