Many cars

var cars = [];      

function setup(){ createCanvas(800, 400); // make 25 cars 

          for(var i = 0; i < 25; i++) { cars[i] = new Car(); }} 

function draw(){ // clear background 

  background(255); // loop through each car 

  for(var i = 0; i < cars.length; i++) { cars[i].drive(); cars[i].display(); } } 

// car constructor

function Car(ypos, speed){ this.xpos = random(width); this.ypos = random(height); this.speed = random(4); this.c = color(random(255), random(255), random(255));  // drive method 

                          this.drive = function() { if(this.xpos > width) { 

                            this.xpos = -200; // start offscreen 

                            this.ypos = random(height); } this.xpos = this.xpos + this.speed; }  // display method 

                          this.display = function() { // body of the car 

                            fill(this.c); rectMode(CORNER); rect(this.xpos, this.ypos, 100, 50);  // wheels 

                            fill(0); ellipse(this.xpos + 20, this.ypos + 45, 40, 40); ellipse(this.xpos + 80, this.ypos + 45, 40, 40); }}