createCanvas(400, 400)

  noLoop()

  grid = createGrid(20, 20)

  print(grid)

}

​

function draw() {

  background(220)

  displayGrid(grid, 4, 4, width, height)

}

​

function createGrid(N, M) {

  let grid = []

  for (let i = 0; i < N; i++) {

    grid.push([])

    for (let j = 0; j < M; j++) {

      grid[i].push(0)

    }

  }  

  return grid

}

​

function displayGrid(grid, x, y, w, h) {

  let N = grid.length

  let M = grid[0].length

  for (let i = 0; i < N; i++) {

    for (let j = 0; j < M; j++) {

      let x0 = map(j, 0, M, x, x + w)

      let y0 = map(i, 0, N, y, y + h)

      textAlign(CENTER, CENTER)

      text(grid[i][j], x0, y0)

    }

  }  

}