#include <FastLED.h>
#define NUM_LEDS 10
CRGB leds[NUM_LEDS];
void setup() { FastLED.addLeds<NEOPIXEL, 2>(leds, NUM_LEDS); }
void loop() {
  static uint8_t change=0;
  fill_solid(leds, NUM_LEDS, CHSV(change, 225, 255));
  FastLED.show();
  change++;
  delay(50);
  
}