// Simplified from Processing Examples | Basics | Math | Arctangent

void setup()
{
  size(300, 300);
  smooth();
  noStroke();
}

void draw()
{
  background(50);

  drawEye( 50,  16,  80);
  drawEye(100,  85,  40);  
  drawEye( 90, 250, 160);
  drawEye(150,  80,  40); 
  drawEye(225, 160,  80);
}

// Draw an eye of size s at position (x,y)
void drawEye(float x, float y, float s)
{
  // Make the eye look at the mouse
  float angle = atan2(mouseY-y, mouseX-x);
  pushMatrix();
  translate(x, y);
  fill(255);
  ellipse(0, 0, s, s);
  rotate(angle);
  fill(153);
  ellipse(s/4, 0, s/2, s/2);
  popMatrix();
}

// START NO NOTES
// code used to capture screenshots
void keyReleased() {
  if(key == '`' && !online) save("sketch.png");
}