Ball Object Example with Methods

sketch.js

var Ball = function(x, y) {
	this.x = x;
	this.y = y;
	this.diameter = 10;
}

Ball.prototype.show = function() {
	ellipse(this.x, this.y, this.diameter, this.diameter);
}

Ball.prototype.fall = function() {
	this.y = this.y + 1;
}

var balls = [];


function setup() {
  createCanvas(windowWidth, windowHeight); 
}

function draw() {

  background(0);

  for (var i = 0; i < balls.length; i++) {
  	balls[i].show();
  	balls[i].fall();
  }
}

function mousePressed() {
	balls.push( new Ball(mouseX, mouseY) );
}