Hello, i was using this forum to learn and search everything i need for my project. I was looking for neopixel led code to change "mode" display the leds, like blinking, fading solid color, etc. with button. Another button for changing colors, and a potentiometer only for brightness. Ofcourse simple "delay(); are not acceptable in this sytuation so i play with millis();, had to understand how it works, i use serial read to make me understand what is goin on and what and how is ewerythin changing. I use my leds for under and back my drift trike that why sometimes led are split in half. Thanks for the Arduino forum for exist and help 
The code is in attachment, if someone will need it
(i delete all adnotation because i copy paste most of them from this forum and it makes no sense)
enjoy.
iam open on comment and constructive criticism.
Drift trike lights.txt (7.99 KB)