No Delay - Not working

#include <OneButton.h>
#include <FastLED.h>

#define NUM_LEDS 44
#define DATA_PIN 6
CRGB leds[NUM_LEDS];
unsigned long previousPixMillis = 0;
const long pixInterval = 4000;
unsigned long previousBlueMillis = 0;
const long blueInterval = 35;
unsigned long previousGoldMillis = 0;
const long goldInterval = 35;
int pixel = LOW;

//button definitions
#define BUTTON_PIN 8
OneButton button(BUTTON_PIN, true);
int currentAction = 1;

void setup() {
 FastLED.addLeds<WS2812B, DATA_PIN, RBG>(leds, NUM_LEDS);
 FastLED.setCorrection(TypicalPixelString);

 button.attachClick(singleClick);
}

void loop() {
  button.tick();

if (currentAction == 1){
  pixelSwitch();
  }

}

void pixelSwitch(){

    unsigned long currentPixMillis = millis();
    if (currentPixMillis - previousPixMillis >= pixInterval) {
       previousPixMillis = currentPixMillis;

    if (pixel == LOW){
      blueChase();
      pixel = HIGH;
      }
    else if (pixel == HIGH){
      goldChase();
      pixel = LOW;
      }
    }
}

void blueChase(){
for (int i=0; i<NUM_LEDS; i++){
    unsigned long currentBlueMillis = millis();
    if (currentBlueMillis - previousBlueMillis >= blueInterval) {
      previousBlueMillis = currentBlueMillis;
      leds[i]=CRGB::Blue;
      FastLED.show();}
    }
}

void goldChase(){
for (int i=0; i<NUM_LEDS; i++){
    unsigned long currentGoldMillis = millis();
    if (currentGoldMillis - previousGoldMillis >= goldInterval) {
      previousGoldMillis = currentGoldMillis;
      leds[i]=CRGB::Gold;
      FastLED.show();}
    }
}

void singleClick() {

  if (currentAction == 1){
    currentAction = 2;
    fill_solid(leds, NUM_LEDS, CRGB::Gold);
    FastLED.show();
  }
  else if (currentAction == 2){
    currentAction = 3;
    fill_solid(leds, NUM_LEDS, CRGB::Blue);
    FastLED.show();
  }
  else if (currentAction == 3){
    currentAction = 1;
  }
}