LED VU Meter/Color Organ

I want to know how to create an LED VU meter out of this Color Organ Project, and use all Blue LEDs. I would like to use three "Bars" or levels using resistors, but I'm not sure how to do this. I have about 100 blue LEDs with resistors rated at 150Ω and will work with two LEDs in series using 9 VDC.

Video

**broken link removed**