SelectSpawnerTurtle

function start()
   turtle.select(1)
   turtle.suckDown()
end

function suck(id)
   turtle.select(id)
   turtle.suckDown()
   turtle.select(1)
end

local modem = peripheral.wrap("left")
start()
local spawner = 1
modem.open(301)
while true do
   local event, sender, reply, message, distance = os.pullEvent("modem_message")
   if reply == 300 then
      suck(spawner)
      turtle.select(toNumber(message))
      turtle.placeDown()
      spawner = toNumber(message)
   end
end