NeoPixels 12 Rings - Modified

// ArrayOfLedArrays with strips of different length test
// Marc Miller, Apr 2016
//---------------------------------------------------------------

#include "FastLED.h"
#define LED_TYPE NEOPIXEL
#define NUM_STRIPS 12  // Total number of strips

#define NUM_LEDS1 84   // Specify length of each strip
#define NUM_LEDS2 78
#define NUM_LEDS3 72
#define NUM_LEDS4 66
#define NUM_LEDS5 60
#define NUM_LEDS6 54

#define NUM_LEDS7 48
#define NUM_LEDS8 42
#define NUM_LEDS9 36
#define NUM_LEDS10 30
#define NUM_LEDS11 24

#define NUM_LEDS12 47
//etc.

CRGB leds[NUM_STRIPS][NUM_LEDS1];

uint8_t stripLength;  // Used to store a strip length.


//---------------------------------------------------------------
void setup() {

  delay(3000);
  FastLED.addLeds<LED_TYPE, 2>(leds[0], NUM_LEDS1);  // Assign data pins
  FastLED.addLeds<LED_TYPE, 3>(leds[1], NUM_LEDS2);
  FastLED.addLeds<LED_TYPE, 4>(leds[2], NUM_LEDS3);

  FastLED.addLeds<LED_TYPE, 5>(leds[3], NUM_LEDS4);
  FastLED.addLeds<LED_TYPE, 6>(leds[4], NUM_LEDS5);
  FastLED.addLeds<LED_TYPE, 7>(leds[5], NUM_LEDS6);

  FastLED.addLeds<LED_TYPE, 8>(leds[6], NUM_LEDS7);
  FastLED.addLeds<LED_TYPE, 9>(leds[7], NUM_LEDS8);
  FastLED.addLeds<LED_TYPE, 10>(leds[8], NUM_LEDS9);
  FastLED.addLeds<LED_TYPE, 11>(leds[9], NUM_LEDS10);
  FastLED.addLeds<LED_TYPE, 12>(leds[10], NUM_LEDS11);

  FastLED.addLeds<LED_TYPE, 13>(leds[11], NUM_LEDS12);
  //etc.
}


//---------------------------------------------------------------
void loop() {
  for(uint8_t x = 0; x < NUM_STRIPS; x++) {
    stripLength = getStripLength(x);
    fill_rainbow( leds[x], stripLength, millis()/3, 256/stripLength );
  }
  FastLED.show();
  delay(3000);

  for(uint8_t x = 0; x < NUM_STRIPS; x++) {
    stripLength = getStripLength(x);
    uint8_t randomColor = random8();
    fill_solid(leds[x], stripLength, CHSV(randomColor,255,255));
  }
  FastLED.show();
  delay(2000);

  FastLED.clear();  // Clear all data
  FastLED.show();
  delay(1000);

}//end main loop


//-----function to return strip length-----
uint8_t getStripLength(uint8_t stripNumber){
  uint8_t L;
  if (stripNumber == 0) { L = NUM_LEDS1; }
  if (stripNumber == 1) { L = NUM_LEDS2; }
  if (stripNumber == 2) { L = NUM_LEDS3; }
  if (stripNumber == 3) { L = NUM_LEDS4; }
  if (stripNumber == 4) { L = NUM_LEDS5; }
  if (stripNumber == 5) { L = NUM_LEDS6; }

  if (stripNumber == 6) { L = NUM_LEDS7; }
  if (stripNumber == 7) { L = NUM_LEDS8; }
  if (stripNumber == 8) { L = NUM_LEDS9; }
  if (stripNumber == 9) { L = NUM_LEDS10; }
  if (stripNumber == 10) { L = NUM_LEDS11; }

  if (stripNumber == 11) { L = NUM_LEDS12; }

  return L;
}