#include <FastLED.h>
    #define NUM_LEDS 10
    #define DATA_PIN 6
int i=0;
int y=0;
int x=0;
     CRGB leds[NUM_LEDS];
  void setup() { 
       FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
   } 
    void loop()
 { 
    for(y=0; y<NUM_LEDS; y++)
    {
    for (i=0; i<NUM_LEDS-y; i++)
      {
        leds[i] = CRGB::Red; 
        FastLED.show(); 
        delay(30); 
         leds[i-1] = CRGB::Black; 
        FastLED.show(); 
        delay(30); 
      }
    
    } 
      delay(200);
    for (x=NUM_LEDS; x>=0; x--)
      {
        leds[x] = CRGB::Black; 
        FastLED.show(); 
        delay(100); 
      }
      
for(y=0; y<NUM_LEDS; y++)
    {
    for (i=0; i<NUM_LEDS-y; i++)
      {
        leds[i] = CRGB(200, 20, 20+(10*i)); 
        FastLED.show(); 
        delay(30); 
         leds[i-1] = CRGB::Black; 
        FastLED.show(); 
        delay(30); 
      }
    
    } 
      delay(200);
    for (x=NUM_LEDS; x>=0; x--)
      {
        leds[x] = CRGB::Black; 
        FastLED.show(); 
        delay(100); 
      }
      


   }