​

// two empty arrays

var xPositions = [];

var yPositions = [];

​

var index = 0;

​

function setup() {

  createCanvas(800,800);

  // push a bunch of random positions into the arrays

  for (var i = 0; i < 100; i++) {    

    xPositions.push( random(800) );

    yPositions.push( random(800) );

  }

  frameRate(5);

}

​

function draw() {

  background(220);

  noFill(0);

  strokeWeight(5);

  // loop through the arrays and draw ellipses at the x and y positions

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

    curve(xPositions[i], yPositions[i], xPositions[i], yPositions[i], xPositions[i], yPositions[i], random(800), random(800));

  }

​

}