server

local mainId = 1
local stationName = "Oak"
while true do
rednet.open("top")
id1,msg1 = rednet.receive()
rednet.send(mainId,msg1 .. "-1")
id2,msg2 = rednet.receive()
if id2 == mainId then
    if msg2 == "ok" then
        rednet.send(mainId,msg1 .. "-2")
        id3,msg3 = rednet.receive()
        rednet.send(id1,"Bienvenue à :" .. stationName)
        redstone.setOutput("left",true)
        os.sleep(0.5)
        redstone.setOutput("left",false)
    else
        rednet.send(id1,"Tu n'as plus de tickets")
    end
else
    rednet.send(id1,"Une erreur c'est produite")
end
end