SOURCE

let tx=0;
let ty=0;
let tz=0;
let a=0;

let nx;
let ny;
let nz=10;
function setup(){
    createCanvas(600,600);
    noStroke();
    nx = random(600);
    ny = random(600);
}
function draw(){
    fill(random(255),120,120,100);
    nx=random(tx);
    ny=random(ty);
    nz=random(tz);
    nx=map(nx,0,1,0,width);
    ny=map(ny,0,1,0,width);
    nz=map(nz,0,1,10,100);
    tx+=0.011;
    ty+=0.01;
    tz+=0.01;
    a=random(360);
    translate(random);
    rotate(radians(a));
    rect(constrain(nx,0,width),constrain(ny,0,height),nz,nz);
}