let NB = 60;

​

function setup() {

  noStroke();

  createCanvas(windowWidth, windowHeight);

  initW();

  background(0);

}

​

function draw() {

  //background(100);

  drawW();

  fill(255,5)

  moveW();

  snakeW();

}

​

function initW() {

  for (let i = 0; i < NB; i++) {

    w.push(createVector(width/2, height/2));

  }

}

​

function drawW() {

  for (let i = 0; i < NB; i++) {

    circle(w[i].x, w[i].y, 2);

  }

}

​

function moveW() {

  for (let i = 0; i < NB; i++) {

    w[i].x = w[i].x + random(-2, 2);

    w[i].y = w[i].y + random(-2, 2);

  }

}

​

function snakeW() {

  for (let i = 0; i < NB; i++) {

    if (w[i].x > width) { // MUR DROITE

      w[i] = createVector(0, w[i].y);

    }

​

    if (w[i].x < 0) {

      // MUR GAUCHE

      w[i] = createVector(width,  w[i].y);

    }

​

    if ( w[i].y < 0) {

      // MUR HAUT

      w[i] = createVector(w[i].x, height);

    }

    if ( w[i].y > height) {

      // MUR BAS

      w[i] = createVector(w[i].x, 0);

    }

  }

}

​