let acc;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

​

  for (let i = 0; i < 10; i++) {

    let p = new Particle(random(width), random(height), random(10, 30));

    particle.push(p);

  }

}

​

function draw() {

  background(220);

​

  for (let p of particle) {

    let mouse = createVector(mouseX, mouseY);

    acc = p5.Vector.sub(mouse, p.pos);

    acc.setMag(1);

​

    let d = dist(mouse.x, mouse.y, p.pos.x, p.pos.y);

​

    if (d < 50) {

      p.vel.add(acc);

      p.vel.limit(15);

​

      p.show();

      p.update();

​

      stroke(255, 0, 0);

      line(mouse.x, mouse.y, p.pos.x, p.pos.y);

    } else {

​

      p.show();

​

    }

  }

}

​

function touchStarted () {

  var fs = fullscreen();

  if (!fs) {

    fullscreen(true);

  }

}

​

function windowResized() {

  resizeCanvas(windowWidth, windowHeight);

}

​

document.ontouchmove = function(event) {

    event.preventDefault();

};

​