let block;

function setup() {

  new Canvas(400,400);

  walls = new Group();

  let w1 = createSprite(0, -10, 1500, 10);

  walls.add(w1);

  let w2 = createSprite(width + 10, 10, 10, 1500);

  walls.add(w2);

  let w3 = createSprite(0, height + 10, 1500, 10);

  walls.add(w3);

  let w4 = createSprite(-10, 0, 10, 1500);

  walls.add(w4);

​

  for (let i = 0; i < walls.length; i++) {

    walls[i].immovable = true;

    walls[i].collider = 'static';

  }

​

  block = new Sprite(150,150,15,15);

  block.color = "black";

  block.immovable = true;

  block.collider = 'static';

}

​

function draw() {

  background(220);

}

​

function mousePressed() {

  let spr = createSprite(

    width/2, height/2,

    random(10, 50), random(10, 50));

  spr.shapeColor = color(255);

  spr.velocity.y = random(-3,3);

  spr.velocity.x = random(-3, 3);

  spr.position.x = mouseX;

  spr.position.y = mouseY;

  spr.rotationSpeed = ~~random(-5,5);

  spr.friction = 0.1;

  spr.life = ~~random(300)+300;

}