let cnt = 100,dx = 1,dy=1;

let cnty = 0;

function preload() {

  bg = loadImage('https://assets.codepen.io/4559259/IMG_1068.jpeg');

}

function setup() {

  cnv = createCanvas(bg.width/7, bg.height/7);//canvas creation

  noStroke();  

  cnty=height;

  background(bg);

}

function draw() {

  translate(1*sin(frameCount/10)*sin(frameCount/10),0)

  for(i=0;i<height;i=i+dx){    

    let x = cnty;

    let y = i;

    pix = bg.get(bg.width/(width/x),bg.height/(height/y));

    fill(pix[0]+random(-50,50),pix[1]+random(-50,50),pix[2]+random(-50,50),200);

    x = cnty+100;

    y = i; 

    tmpx = random(0,50);

    tmpy = random(3,500);

    rect(x,y,tmpx,tmpy);

    tmpx = random(10,20);

    tmpy = random(300,500);

    x = cnty-100;

    y = i; fill(pix[0]+random(-50,50)+100,pix[1]+random(-50,50),pix[2]+100+random(-50,50),200);

    rect(x,y,tmpx,tmpy);

    tmpx = random(10,20);

    tmpy = random(300,500);

    rect(x-200,y,tmpx,tmpy);

    fill(pix[0]+random(-50,50),pix[1]+random(-50,50)-100,pix[2]+random(-50,50),200);

    rect(x+100,y,tmpx,tmpy);

    tmpx = random(90,100);

    tmpy = random(300,500);

    rect(x,y,tmpx,tmpy);

  }

  cnty = (cnty+dy)%width;

}