[Lua]Password Protected Door

rednet.open("back");
while true do
    term.clear()
    term.setCursorPos(1, 1)
    print("Acces restreind au roi et sa cour:")
    input = read("*")
    if input == "Alberto" then
  term.setTextColor(colors.green)
  rednet.send(1, true);
  term.write("Bienvenue !")
  term.setTextColor(colors.white)
        redstone.setOutput("left", true)
        sleep(5)
        redstone.setOutput("left", false)
    else
  term.setTextColor(colors.red)
  rednet.send(1, false);
        term.write("Mauvais mot de passe")
  term.setTextColor(colors.white)
        sleep(3)
 end
end