i need a schematic of pic based alarm system..help me please

I have a project which is pic based alarm system..i have not found that system's circuit diagram....and also that alarm system must contain something else too..if alarm system active.,alarm system must call one or two telephone number which are saved in it's memory...maybe it is easy to do it..i dont know yet..but at first i need a circuit diagram of pic based alarm system....

if u have a such a project or if u have that circuit diagram please help me.....

thanks .......

Burhan..