Push Button on/off toggle for W2812B LEDSTRIP

Using Arduino LEDs and Multiplexing
2

Firstly, your debouncing function is incorrect. You can refer to the deboucing example.

I would like to recommend using this library to make it easier. Code for debouncing and detecting the event is very simple

#include <ezButton.h>

ezButton button(7);  // create Button object that attach to pin 7;

bool showLights = true;

void setup() {
  button.setDebounceTime(50); // set debounce time to 50 milliseconds
}

void loop() {
  button.loop(); // MUST call the loop() function first

  if(button.isPressed())
    showLights = !showLights;

  // add your code to control led here
}

Secondly, you are using delay() function. This will make Arduino miss some pressing events. I recommend to use timestamp instead, see BlinkWithoutDelay example