The major component, in addition to Arduino board is the LED light bar. The LED Bar is a prepackaged strip of 3 high-output LEDs powered by 12VDC. Each unit comes with a fully assembled and tested PCB ...

5. Install FastLED. You’ll need this program for your code to run—it’s, a library that takes some of the nitty-gritty work out of coding each LED to light up manually.

Bucking the downward trend [HansLuijten] provides an astoundingly thorough set of LED strip patterns in his comprehensive post titled Arduino LED strip effects.