// Dartmouth CS 2, Winter 2009, Chris Bailey-Kellogg
// Notes 9 | Sketch 6

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

void draw()
{
  // Fade away
  fill(0,5);
  noStroke();
  rect(0,0,width,height);

  // Circles surrounding mouse position
  noFill();
  for (int d=10; d<200; d+=20) {
    stroke(255-d);
    ellipse(mouseX,mouseY, d,d);
  }
}