[CC] - Home alarm system

term.clear()
term.setCursorPos(1,1)
print("Nova Alarms - v1.0")
local admin = "Lewisk3"
local state = "on"
local chat = peripheral.wrap("right")
local alarm = peripheral.wrap("left")
local log = ".log"
local cmd = "alarm:"

local function update()
  local ev, sd, pl, st = os.pullEvent()
  if(ev == "chatbox_command")then
    if(pl == admin)then
      if(st:sub(1,#cmd) == cmd)then
         state = st:sub(#cmd+1,#st)
         chat.tell(admin,"Alarm state set to: " .. state)
      end
    end
  end

    if(state=="on" and rs.getInput("front") and not alarm.isPlaying())then
       print("Alarm triggered!")
       chat.tell(admin,"Alarm has triggered!")
       alarm.start()
       local f = fs.open(log,"w")
       f.writeLine(os.time() .. ": alarm triggered.")
       f.close()
    elseif(alarm.isPlaying() and state ~= "on")then
       chat.tell(admin,"Stopping alarm...")
       print("Stopping alarm")
       alarm.stop()
    end
end