Infinity bot (update 2)

a = []
b = 0
c = ""
d = 0
h = 0
num = 0
t = new Date()
time = t.getTime()
save = 0
u = 0
ud = 0

// NEW tracking variables
lastX = null
lastY = null
lastLen = 0

// Toggle milliseconds display
showMillis = true

function omega(n) {
  num = 1
  a = []
  h = 64
  while (n > h) {
    h = h + h
  }
  while (h != 32) {
    ud = (n * num) % h
    u = 1
    while (ud >= h / 2) {
      u = u * 2
      ud = (ud * 2) % h
    }
    num = num * u
    a = a.concat(u)
    h = h / 2
  }
  return a
}

function infinity(n) {
  return omega(n)
}

function update() {
  if (d % 7 == 0) {

    // current cursor position (where ticker should appear)
    let x = cursor.x
    let y = cursor.y

    // ERASE old ticker text if it existed
    if (lastX !== null) {
      cursor.x = lastX
      cursor.y = lastY
      for (let i = 0; i < lastLen; i++) {
        writeChar(" ", 1)
      }
    }

    // format b based on showMillis
    let bStr = showMillis ? (Math.floor(b * 1000) / 1000) : Math.floor(b)

    // update string
    c = bStr + " ~ [" + infinity(b).join() + "]"
    t = new Date()
    b = (t.getTime() - time) / 1000 + save

    // DRAW new text at the current cursor location
    cursor.x = x
    cursor.y = y
    for (let i = 0; i < c.length; i++) {
      writeChar(c[i], 1)
    }

    // REMEMBER where it was drawn this frame
    lastX = x
    lastY = y
    lastLen = c.length

    // RESTORE cursor to original location
    cursor.x = x
    cursor.y = y
  }

  d++
  requestAnimationFrame(update)
}

requestAnimationFrame(update)

w.on("msg", (data) => {
  // save command
  if (data.msg.startsWith("save ") && data.nick == "CalculatorBot") {
    save = Number(data.msg.substring(5)) - b
  }

  // toggle milliseconds display
  if (data.msg === "toggleMillis" && data.nick == "CalculatorBot") {
    showMillis = !showMillis
  }
})