rows = 100,

      squareSide = 5;

let grid,

    ant,

    steps,

    currentStep,

    stepsIndicator;

​

function setup() {

  createCanvas(columns * squareSide, rows * squareSide);

  grid = new Grid(columns, rows, squareSide);

  ant = new Ant(grid, Math.floor(columns / 2), Math.floor(rows / 2), 1);

  steps = 20;

  currentStep = 0;

  stepsIndicator = createP("");

  stepsIndicator.addClass("indicator");

}

​

function draw() {

  currentStep += steps;

  for (let n = 0; n < steps; n++) {

    ant.applyRules();

  }

  grid.show();

  ant.show();

  stepsIndicator.html("Step <strong>" + currentStep + "</strong>");

}