Arduino Home Security System

Hello everyone.. Im new in arduino.. And i would like to ask about this problem.. Im doing my final years project.. Home security system.. And im getting this problem.. Any suggestion..?

first, read HOW TO USE THIS FORUM. it is a sticky post at the top of every forum here.
read #7 about posting code.

the tell what your end goal is.
then state what problem you are having

if you are looking for general information. tell us that.
if you are looking for specific help in code that is not working, then post your entire sketch.
if your sketch is too large, then copy it and paste it into a text editor and attach a text file.