#include "Arduino.h"
#include <FastLED.h>
FASTLED_USING_NAMESPACE

#define NUM_LEDS 60

CRGB rawleds[NUM_LEDS];

const int virtualleds[10]
{ 2,  // 1
  7,  // 2
  0,  // 3
  4,  // 4
  12, // 5
  3,  // 6
  11, // 7
  1,  // 8
  15, // 9
  13 // 10
} ;

#define BRIGHTNESS         100
#define FRAMES_PER_SECOND  120

void rainbow();

void my_fill_rainbow( struct CRGB * pFirstLED, int numToFill, int *virtualleds,
                  uint8_t initialhue,
                  uint8_t deltahue );

void setup()
{
  // initialize LED digital pin as an output.
   FastLED.addLeds<NEOPIXEL, 6>(rawleds, NUM_LEDS);
   FastLED.setBrightness(BRIGHTNESS);
}

uint8_t gHue = 0; // rotating "base color" used by many of the patterns

void loop()
{

  // send the 'leds' array out to the actual LED strip
  FastLED.show();
  // insert a delay to keep the framerate modest
  FastLED.delay(1000/FRAMES_PER_SECOND);

  // do some periodic updates
  EVERY_N_MILLISECONDS( 1 ) { gHue++; } // slowly cycle the "base color" through the rainbow
  rainbow();
}


void rainbow()
{
  // my modified FastLED's built-in rainbow generator
  my_fill_rainbow( rawleds, 10, virtualleds, gHue, 7);
}

void my_fill_rainbow( struct CRGB * pFirstLED, int numToFill, int *virtualleds,
                  uint8_t initialhue,
                  uint8_t deltahue )
{
    CHSV hsv;
    hsv.hue = initialhue;
    hsv.val = 255;
    hsv.sat = 240;
    for( int i = 0; i < numToFill; i++) {
        int virtualled=virtualleds[i];
        pFirstLED[virtualled] = hsv;
        hsv.hue += deltahue;
    }
}