let cols = 50;

let rows = 50;

let cellWidth, cellHeight;

​

function setup() {//ts runs once at the page load

  bsp;createCanvas(620, 620);

  bsp;cellWidth = width / cols;

  bsp;cellHeight = height / rows;

  bsp;for (let i = 0; i  cols; i++) {

    ;  grid[i] = [];

    ;  for (let j = 0; j  rows; j++) {

      nbsp;  grid[i][j] = floor(random(0));//create a grid and all that

      nbsp;  if (grid[i][j] === 1) {

               fill(0);

        } ;    } else {

               fill(255);

        }p;    }

        p;    rect(i * cellWidth, j * cellHeight, cellWidth, cellHeight);

    };  }

  }

}

​

​

function draw() {

  bsp;if (mouseIsPressed){