LED Police chaser code

I find it hard to understand. How can I integrate your part code into mine?

Your code:

    byte but = digitalRead (pinBut);
    if (butState != but)  {
        butState = but;
        delay (10);         // debounce

        if (LOW == but)
            enable = ! enable;

My code:

#define RED 0x0 // Which LED to Strobe
#define BLUE 0x1


byte whichLED = RED; // Variable to track which LED is on

// constants won't change. Used here to set a pin number:
const int LED_Red = 11; // Where are the LEDs connected?
const int LED_Blue = 8;
const int strobeButton = A1; 

byte Red_State = LOW; // State variables for the LEDs
byte Blue_State = LOW;
byte strobeButtonState = LOW;

bool    enable = true;

unsigned long switchDelay = 250; // delay values changing flashing behavior
unsigned long strobeDelay = 50;
unsigned long strobeWait = strobeDelay; // Seed initial wait for strobe effect
unsigned long waitUntilSwitch = switchDelay; // seed initial wait, switch LEDs
unsigned long previousMillis = 0; // will store last time LED was updated

// Variables will change:
int pinArray[] = {8, 11};
int count = 0;
int timer = 50;

void setup() {
pinMode(LED_Red, OUTPUT);
pinMode(LED_Blue, OUTPUT);
pinMode(strobeButton, INPUT_PULLUP);

    digitalWrite (LED_Red,  HIGH);
    digitalWrite (LED_Blue, LOW);
    
for (count = 0; count < 6; count++) {
pinMode(pinArray[count], OUTPUT);
}
}

void loop() {
strobeButtonState = digitalRead(A1);
  if (strobeButtonState == LOW)
  {
digitalWrite(LED_Red, Red_State); // each iteration of loop() sets the IO pins
digitalWrite(LED_Blue, Blue_State); // even if they don't change, that's okay
 
     if ((long)(millis() - waitUntilSwitch)>=0)
     {
      Red_State = LOW;
      Blue_State = LOW;
      whichLED = !whichLED;
      waitUntilSwitch += switchDelay;
     }
 
     if ((long)(millis() - strobeWait)>=0)
     {
      if (whichLED == RED)
          Red_State = ! Red_State;
      if (whichLED == BLUE)
          Blue_State = ! Blue_State;
          
      strobeWait += strobeDelay;
}
  }
    }