let y = [];

let num = 400;

function setup() {

  createCanvas(windowWidth, windowHeight);

  for(let i=0;i<num;i++) {

    x.push(width/2);

    y.push(height/2);

  }

  noStroke();

}

​

function draw() {

  background(40);

  for(let i=0;i<num;i++) {

  let x1 = noise((frameCount+i*10) * 0.01,0.2)-0.5;

  let y1 = noise(0.5,(frameCount+i*10) * 0.01)-0.5;

  x[i] += x1*10;

  y[i] += y1*10;

  if(x[i] > width) x[i] = 0;

  if(y[i] > height) y[i] = 0;

  if(x[i] < 0) x[i] = width;

  if(y[i] < 0) y[i] = height;

  push();

  translate(x[i], y[i]);

  rotate(x[i] * 0.01);

  fill(200,200,255,180);

  textAlign(CENTER);

  textSize(30);

  //text("ok",0,0);

  rect(0,0,2,100);

  pop();

    }

}