help with button switches for a ws2812b project

thank you Paul for your help and guidance, I have modified my posts to better display the code in rhe correct fashion.

Since my buttons have 4 connectors on the back, I am still having a hard time understanding where the other two connectors would go after I connect 1 of the 4 to ground, and 2/4 to to the pin assigned for the button. where would the third and fourth connectors go from the button?

also, I keep hearing about how interrupts are useless but i dont understand why?