#include <FastLED.h>
#define NUM_LEDS 16 

#define DATA_PIN 2
CRGB leds[NUM_LEDS];

void setup() {
 
FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, NUM_LEDS);
//start
for( int i = 0; i < NUM_LEDS; i++) {
  int col = 250 + i*15;
        leds[i] = CHSV((col), (200), (255));
        FastLED.show();
        delay(100);     
 }
 for( int i = 0; i < NUM_LEDS; i++) {
  int col = 220 + i*15;
        leds[i] = CRGB::Black;
       // FastLED.show();
        delay(100);     
 }

}

void loop() {


   for( int i = 0; i < NUM_LEDS; i++) {

        leds[i] = CRGB::Red;
        FastLED.show();
 }
 delay(500);
  for( int i = 0; i < NUM_LEDS; i++) {

        leds[i] = CRGB::Black;
        FastLED.show();
 }

  delay(500);


   for( int i = 0; i < NUM_LEDS; i++) {

        leds[i] = CRGB::Green;
        FastLED.show();
 }
 delay(500);
  for( int i = 0; i < NUM_LEDS; i++) {

        leds[i] = CRGB::Black;
        FastLED.show();
 }
  delay(500);


   for( int i = 0; i < NUM_LEDS; i++) {

        leds[i] = CRGB::Blue;
        FastLED.show();
 }
 delay(500);
  for( int i = 0; i < NUM_LEDS; i++) {

        leds[i] = CRGB::Black;
        FastLED.show();
 }


 for( int i = 0; i < 100; i++) {
  int col = random(360);
  int nr = random(16);
  
        leds[nr] = CHSV((col), (200), (255));
        FastLED.show();
        delay(100);   
        leds[nr] = CRGB::Black;
        FastLED.show();  
 }
  delay(500);
  for( int i = 0; i < 100; i++) {
  int col = random(360);
  int nr = random(16);
  
        leds[nr] = CHSV((col), (200), (255));
        FastLED.show();
        delay(100);   
        nr = random(16);
        leds[nr] = CRGB::Black;
        FastLED.show();  
 }
 
  delay(500);*/
}