const rows = 5;

let cellWidth;

let cellHeight;

​

function setup() {

  createCanvas(425, 425);

​

  cellWidth = width / columns;

  cellHeight = height / rows;

​

  noFill();

  background(32);

  stroke(255);

​

  for (let c = 0; c < columns; c++) {

    for (let r = 0; r < rows; r++) {

      const cellX = c * cellWidth;

      const cellY = r * cellHeight;

​

      drawCell(cellX, cellY);

    }

  }

  frameRate(10);

}

​

function draw() {

  const c = int(random(columns));

  const r = int(random(rows));

  const cellX = c * cellWidth;

  const cellY = r * cellHeight;

​

  drawCell(cellX, cellY);

}

​

function drawCell(x, y) {

  noStroke();

  fill(32);

  rect(x, y, cellWidth, cellHeight);

  noFill();

  const squareCount = 10;

  const randomOffset = 5;

​

  for (let i = 1; i <= squareCount; i++) {

    const layerOffset = 5 * i;

​

    const xOne = x + layerOffset + random(-randomOffset, randomOffset);

    const yOne = y + layerOffset + random(-randomOffset, randomOffset);

​

    const xTwo =

      x + cellWidth - layerOffset + random(-randomOffset, randomOffset);

    const yTwo = y + layerOffset + random(-randomOffset, randomOffset);

​

    const xThree =

      x + cellWidth - layerOffset + random(-randomOffset, randomOffset);

    const yThree =

      y + cellHeight - layerOffset + random(-randomOffset, randomOffset);

​

    const xFour = x + layerOffset + random(-randomOffset, randomOffset);

    const yFour =

      y + cellHeight - layerOffset + random(-randomOffset, randomOffset);

​

    stroke(random(256), random(256), random(256));

​

    quad(xOne, yOne, xTwo, yTwo, xThree, yThree, xFour, yFour);

  }

}

​