Sone one have any idea? [Alarm building]

Hello every one.

I have build a simple alarm system (see picture at the bottom)
but now I don't Know what I'm suppose to do. we have free build in school and we are suppose to build some thing that are a alarm. We had to build this (see picture at the bottom) But I most warn you I did the picture on 5 min or so, so it's not good...

So do any one have any idea on what to build on it?
I got a idea on some lasers but I dunno how to build that...

OBS: I will get the more info and picture tomorrow when we have the lesson... And dunno if I did the PNP and NPN right tho...
and the resistor I dunno what number...

I guess it would be better to post this when I know more but I have like 2h before next lesson...

What is 1 2 and 3, and what are those little trapezoidal blocks NPN or PNP transistors?

Sceadwian said:

What is 1 2 and 3, and what are those little trapezoidal blocks NPN or PNP transistors?

Click to expand...

well I'm building a alarm from the start = I got nails some wires the dots are nails... and the 1,2,3 is the resistor I dunno what resistants they are... I post it in 24h or some thing...

btw I got a better picture... well its the alarm that the whole class made... and now I see there are part that is missing from my master work xD