Push button to control led strip

Push button to control led strip

Hello guys
I'm working on a project.
It pretty basic but I can't make it work.
I want to light up a led stip and control with two buttons.

When no button are press : All the led are yellow
When button 1 is press : Set green for 0 to 26, yellow for 27 to 40 etc
When button 2 is press

“. . . but I can't make it work.”

We would like to help but we can’t because you haven’t shown us the code you can’t make work.

you should provide more detail about your project like what hardware you use. but take a look at this link
FastLED