afk.lua

local gpu = require("component").gpu
local redstone = require("component").redstone
local radar = require("component").radar
local computer = require("computer")

local distance = 2
local timeout = 30
-----------------------------------------------------

gpu.setResolution(2, 1)
gpu.set(1, 1, "  ")

local function wait(time)
  time = math.floor(time)
  for i = time, 1, -1 do
    local out = tostring(i)
    if string.len(out) == 1 then out = "0"..out end
    gpu.set(1, 1, out)

    os.sleep(1)
    players = radar.getPlayers(distance)
    if #players == 0 then
      gpu.set(1, 1, "  ")
      return false
    end
  end

  return true
end

while true do
  local players = radar.getPlayers(distance)
  if #players > 0 then
    local result = true
    while result do
      result = wait(timeout)
      if result then
        gpu.set(1, 1, "$$")
        redstone.setOutput(require("sides").up, 15)
        os.sleep(0.2)
        redstone.setOutput(require("sides").up, 0)
        os.sleep(0.3)
      end
    end
  end
end