Code For WB2812B RGB Strips

#include <FastLED.h>
#define NUM_LEDS 60
#define DATA_PIN 2

CRGB leds[NUM_LEDS];

int red_pin= 8;
int green_pin= 9;
int blue_pin= 10;


void setup() { 
  delay(8000);
  Serial.begin(57600);
  LEDS.addLeds<WS2812,DATA_PIN,RGB>(leds,NUM_LEDS);
  LEDS.setBrightness(120 );
  pinMode(red_pin, OUTPUT);
  pinMode(green_pin, OUTPUT);
  pinMode(blue_pin, OUTPUT);

  for(int q = 0; q < NUM_LEDS; q++) {
    leds[q] = CRGB(255, 255, 255);
    FastLED.show(); 
    delay(220);
  }
  for(int m = 0; m < 255; m++) {
    RGF(m, m, m);
    delay(5);
  }
}


void loop() { 
  
  for(int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB(0, 255, 0);
    FastLED.show(); 
    delay(30);
  }
  delay(250);
  for(int i = (NUM_LEDS)-1; i >= 0; i--) {
    leds[i] = CRGB(0, 0, 255);
    FastLED.show();
    delay(30);
  }
  delay(250);
}

void RGF (int red_light_value, int green_light_value, int blue_light_value){
  analogWrite(red_pin, red_light_value);
  analogWrite(green_pin, green_light_value);
  analogWrite(blue_pin, blue_light_value);
}