let direction=1;

let x;

let y;

let speed=1;

​

function setup() {

  createCanvas(1280, 720);

  ellipseMode(CENTER);

}

​

function draw() {

  background(0,5); 

  strokeWeight(200);

  stroke(240,200,255,80);

  line(mouseX,0,mouseX,height);  

  strokeWeight(40);

  stroke(0,255,255,80);

  let my=mouseY/2+120;

  line(0,my,width,my);

  strokeWeight(100);

  stroke(255,1,200,60);

  let mx=mouseX/2+280;

  line(mx,0,mx,height);

  strokeWeight(120);

  stroke(100,153,255,80);

  line(0,mouseY,width,mouseY);

​

  if(diam>=58||diam<=-3){

     direction*=-1;}

  if(direction==-1){

  fill(100,153,255,80)

  }else{

    fill(255,1,200,60);

  }

  if(mouseIsPressed||keyIsPressed){

  fill(0,0)

  }

  for (let y=20; y<=height; y+=40)

    {for (let x=20; x<=width; x+=40)

      {  

      if(keyIsPressed){

      x+=random(-speed,speed);    

      } 

        strokeWeight(4);

        stroke(0,255,255,80);

        ellipse(x,y,diam);

      }}

​

  for (let x=40; x<=width; x+=40)

      {

        strokeWeight(5);

        stroke(255,1,200,40);

        line(x,0,x,height);

      }

  for (let y=40; y<=height; y+=40)

      {

        strokeWeight(4);

        stroke(255,1,200,40);

        line(0,y,width,y);

      }

diam+=1*direction*speed;  

}