//nest  loop
//let variable=random(1)
//if<0.5 else

let gridsize;


function setup() {
  createCanvas(windowWidth, windowHeight);
  
}

function draw() {
  
  gridsize=width/10
  let x;
  let y;
  
   for(x=0;x<width;x+=gridsize){
     for(y=0;y<height;y+=gridsize){
       
       let seed=random(1);
       noStroke();
       if (seed<0.5){
         fill (0);
       }else{
         fill(255);
       }
       
       rect(x,y,gridsize)}
   }
  noLoop();  
}

function windowResized() {
  resizeCanvas(windowWidth, windowHeight);
}