let xSpacing = 35;

let startW = 50; // width of first square

​

​

function setup() {

  createCanvas(600, 600);

  noLoop();

​

}

​

function draw() {

  background("#F0D3F7");

  stroke("#B98EA7");

  fill("#A57982");

​

​

​

let i = 0; // index variable

  for (let y = 10; y < height; y += ySpacing) {

    for (let x = 0; x < width; x += xSpacing) {

       let sw = random(1,20); // variable to hold a random strokeWeight

    strokeWeight(sw);

      square(x, y, startW-i*0.3); // x, y, w // square or a rectangle -- x and y are top left point

      i++; // the same as writing 'i=i+1' or 'i+=1'

    }

  }

}

​