LED strip color changer

// FastLED
#include <FastLED.h>

#define NUM_LEDS 60
#define DAT_PIN 2
#define TAIL_LENGTH 32

int COLOR_POS = 10;

CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<NEOPIXEL, DAT_PIN>(leds, NUM_LEDS);
}

void loop() {
  // Changing COLOR Loop
 for(int COLOR = 0; COLOR < 255; COLOR = COLOR + 35) {

   // Changing LED Loop
    for(int POS = 0; POS < NUM_LEDS; POS++){

        leds[POS] = CHSV(COLOR, 255, 255);

    FastLED.show();
    //Code to change LED cover depending on current position of the LED
      if (POS > COLOR_POS ){
        COLOR = COLOR + 70;
        COLOR_POS = COLOR_POS + 10;
      } else if (COLOR_POS >= 70) {
        COLOR_POS = 10;
      }
      //Fading loop
    for(int fade = 0; fade < NUM_LEDS; fade++) {
      leds[fade].fadeToBlackBy(TAIL_LENGTH);
    delay(01);
    }
   }
  }
}