Nexus turtle

modemSide = "right"
nexusComputerID = 7
monitorSide = "left" --can be set to nil

rednet.open(modemSide)
if monitorSide == nil then
    m = term
else
    m = peripheral.wrap(monitorSide)
end

while true do
    sendID,mess,dist=rednet.receive()
    print(mess)
    if sendID == nexusComputerID then
        print("Opening portal #"..mess)
        local i = tonumber(mess)
        turtle.select(i)
        turtle.drop()
        for i=5,1,-1 do
            m.clear()
            m.setCursorPos(1,1)
            m.write("Go!")
            m.setCursorPos(2,2)
            m.setTextScale(2)
            m.write(tostring(i))
            sleep(1)
        end
        m.clear()
        turtle.suck()
    end
end