const cellSize = 2;

let currentRow = 0;

​

function setup() {

  createCanvas(500, 400);

  background("black");

​

  const numCells = width / cellSize;

  for (let i = 0; i < numCells; i++) {

    cells[i] = round(random(0, 2));

  }

  cells[round(numCells / 2)] = 1;

}

​

function draw() {

  fill("white");

  noStroke();

  translate(0, currentRow * cellSize);

  currentRow++;

  for (let i = 0; i < cells.length; i++) {

    if (cells[i] == 0) {

      fill("black");

      rect(i * cellSize, 0, cellSize, cellSize);

    } else if (cells[i] == 2) {

      fill("white");

      ellipse(i * cellSize, 0, cellSize, cellSize);

    } else {

      noFill();

      stroke("white");

      rect(i * cellSize, 0, cellSize / i, cellSize);

    }

  }

​

  let newCells = [];

  for (let i = 0; i < cells.length; i++) {

    const leftleft = cells[i - 2] ?? 0;

    const left = cells[i - 1] ?? 0;

    const middle = cells[i];

    const right = cells[i + 1] ?? 0;

    const rightright = cells[i + 2] ?? 0;

    const sum = left + middle + right + leftleft + rightright;

    if (sum == 2 || sum < 3) {

      newCells[i] = 1;

    } else if (sum <= 5) {

      newCells[i] = 2;

    } else {

      newCells[i] = 0;

    }

  }

  cells = newCells;

  // translate(10,3);

}

​