float x = 0, y = 0; // The current coordinates of the ball
float r = 20; // ball radius
float easing = 0.05; // how quickly the ball catches up

void setup()
{
  size(400,400);
  smooth();
  noStroke();
}

void draw()
{
  background(0);
  fill(255);
  ellipse(x,y,2*r,2*r);
  fill(128);
  ellipse(mouseX,mouseY,r/2,r/2);

  // take a step
  float vx = (mouseX - x) * easing;
  float vy = (mouseY - y) * easing;
  x += vx; y += vy;
}

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