cells_1

cells.js

tiles = '*-+=o8|:x '.split('')
// tiles = ' #.'.split('')

function newWorld () {
  world = []

  for (let i = 0; i < 23; i++) {
    world.push([])
    for (let j = 0; j < 80; j++) {
      // world[i].push(' ')
      world[i].push(tiles[Math.floor(Math.random()*tiles.length)])
    }
  }

  return world
}

world = newWorld()

function print () {
  console.clear()
  console.log(world.map(e => e.join('')).join('\n'))
}

function arrct (arr, e) {
  let ct = 0
  for (let i = 0; i < arr.length; i++) {
    if (arr[i] == e) {
      ct += 1
    }
  }

  return ct
}

function update (n) {
  tmp = newWorld()
  for (let i = 0; i < world.length; i++) {
    for (let j = 0; j < world[i].length; j++) {
      cts = []
      for (let x = -1; x < 2; x++) {
        for (let y = -1; y < 2; y++) {
          nx = x + j
          ny = y + i
          if (nx < 0 || ny < 0 || nx >= world[i].length || ny >= world.length) {
            cts.push('?')
          } else {
            if (world[ny][nx] == world[i][j]) {
              cts.push('?')
            } else {
              cts.push(world[ny][nx])
            }
          }
        }
      }

      c = cts[Math.floor(Math.random()*cts.length)]

      if (c === '?') {
        c = tiles[Math.floor(Math.random()*tiles.length)]
      }

      d = tmp[i][j]

      if (arrct(cts, d) < 3 || arrct(cts, d) > 6) {
        tmp[i][j] = c
      }
    }
  }

  world = tmp
  print()

  if (n != 0) {
    setTimeout(update.bind(this, n-1), 100);
  }
}

update(1000000)