i am new to arduino and i don't know where to start. my manager give a project of arduino, and i don't know anything.
This is by no means a trivial project and one wonders how the manager got the impression that you are competent to do it !
Maybe now is the time to explain to the manager that you need training?
If you really are a beginner then I suggest you get yourself an Uno and a three or four regular LEDs with suitable resistors and learn how to control them.
The example programs that come with the Arduino IDE contain all of the techniques you will require. You may also wish to have a look at the demo Several Things at a Time which illustrates how to flash a few LEDs
We are not here to provide you with an instant complete solution, we are here to provide guidance and advice.
This guidance will help you develop your sketch, so that you understand how it works and you can debug any problems that may develop.
Can you post a diagram of how the LEDs are wired up?
What are you going to use for a power supply?
Can you tell us your electronics, programming, arduino, hardware experience?
if you have a code then help me otherwise shutup
You said you don't know anything so the advice I gave you in Reply #1 seems perfectly appropriate to me (and, I suspect, to other Forum regulars). All of the people offering advice here are unpaid volunteers. Being rude is not a good start to any relationship.
If you just want someone to write a program for you then please ask in the Gigs and Collaborations section of the Forum and be prepared to pay.