local sensor = peripheral.wrap('left')
local teleposer = peripheral.wrap('right')

redstone.setOutput('right', false)

whiteList =
{
--players
'Vispoh',
}

--Compare string to table using
table.contains = function(self, element)
  for k,v in pairs(self) do
    if v == element then
      return true
    end
  end
  return false
end

--Main loop
while true do

  playerTable = sensor.getPlayers()

  for i = 1,#playerTable do

    playerName = playerTable[i]["name"]

    if table.contains(whiteList, playerName)
    then
    else
      redstone.setOutput('right', true)
      sleep(1)
      teleposer.destroyStack(1)
      redstone.setOutput('right', false)
      os.reboot()
    end
  end
end