void setup()
{
  size(300,300);
  smooth();
  stroke(255);
  strokeWeight(10);
}

void draw()
{
  background(0);
  float dx = mouseX - width/2;
  float dy = mouseY - height/2;
  float angle = atan2(dy, dx);  

  translate(width/2,height/2);
  rotate(angle);
  line(0,0,100,0);
}

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