var y = [];

​

function setup() {

  createCanvas(800, 800);

}

​

function draw() {

  //background(220);

​

  if (mouseIsPressed) {

    x.push(mouseX);

    y.push(mouseY);

  }

​

  for (var i=0; i < x.length; i=i+1) {

    ellipse(x[i], y[i], 40, 40);

​

    var dx = mouseX-x[i];

    var dy = mouseY-y[i];

    x[i] = x[i] + dx/100;

    y[i] = y[i] + dy/100;

  }

}