Door Server

local pass = "Tech"

rednet.open("left")

while true do
  rs.setOutput("bottom", true)
  local id, msg = rednet.receive()
  if msg == pass then
    rednet.send(id, "yes")
    rs.setOutput("bottom", false)
    sleep(2.5)
    rs.setOutput("bottom", true)
  else
    rednet.send(id, "no")
  end
end