Develop Simple Security System

A developer wants you to develop a simple security system. The system should be able to
give warning (eg beeping) if the movement is detected once the system is set. The system
should be able to count how many movements are detected during the set time (real
time).

here comes a new question if my previous question is too hard to be solved. we re only given this two choices left.
We're not going to write your homework for you.

Show us what you've done, and tell us what specific problems you're having with it. Then we'll be able to help.
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