Added notificaiton sound

programs/chat.lua

@@ -1,5 +1,6 @@
 local modem = peripheral.find("modem")
 local PORT = 1
+local speaker = require("speaker")
 
 local function start()
     if modem then
@@ -30,6 +31,7 @@ local function receiveLoop()
             term.setCursorPos(1, y)
             term.clearLine()
             print("Received: " .. tostring(message))
+            speaker.play("notification")
             write("> ")
         end
     end