electric scheme

Hi there! I've just created a simple project using two "arduino uno Rev 3". and leds.
Let me explain briefly how it works. I put an audio female jack linked to audio male jack,
in order to take the music through the pc. The music is located in the first arduino, then it reaches the second one through the two xbee modules where the 12 leds go to switch on (this is called Vu meter). What I'm asking is if somebody is able to make the related electric scheme of it. I don't have so much experience about it, so I kindly ask to help me please.
Please find attached some photos of the project and a drawing of the electrical circuit made by Fritzing software. I really need some help because I'm desperated :).