Minecraft>BaseEmergency

rednet.open("right")
local tmp = false
while true do
        event, id, text = os.pullEvent()
        if event == "redstone" then
        if redstone.getInput("bottom") and tmp == false then
            tmp = true
            redstone.setOutput("left", true)
            rednet.send(24, "alarm-on")
        elseif redstone.getInput("back") then
            rednet.send(24, "ready-button")
        end
        elseif event == "rednet_message" then
        if id == 24 and text == "alarm-off" and tmp == true then
            redstone.setOutput("left", false)
            tmp = false
        end
    end
end