Rainbow LEDs for multiple strips

MultiStripRainbow.ino

#include "FastLED.h"

// number of strips
#define NUM_STRIPS 3 

// number of lights per strip, if equal
#define NUM_LEDS 2

struct CRGB leds1[NUM_LEDS];
struct CRGB leds2[NUM_LEDS];
struct CRGB leds3[NUM_LEDS];

/* 
Create an array of starting hue values 0-255, 
in this case we're starting with red,green,blue
you can use a color wheel, (degrees/360)*255
http://www.ncl.ucar.edu/Applications/Images/color_18_3_lg.png
*/
uint8_t hues[NUM_STRIPS] = {0,90,160};

void setup() {
   // sanity check delay - allows reprogramming if accidently blowing power w/leds
   delay(2000);
 
   // init strips on pins 7,8,9
   FastLED.addLeds<WS2812, 9, GRB>(leds1, NUM_LEDS);
   FastLED.addLeds<WS2812, 8, GRB>(leds2, NUM_LEDS);
   FastLED.addLeds<WS2812, 7, GRB>(leds3, NUM_LEDS);
}

void loop() {
  
   // fill with rainbows!!

   fill_rainbow(leds1, NUM_LEDS, hues[0]);
   fill_rainbow(leds2, NUM_LEDS, hues[1]);
   fill_rainbow(leds3, NUM_LEDS, hues[2]);
   FastLED.show();
   
   // loop through # of strips
   for(uint8_t i = 0; i < NUM_STRIPS; i++) {
     // if hue > 255 set to 0, else add 1.
     hues[i] == 255 ? hues[i]=0 : hues[i]++;
   }
   
   // delay
   delay(100);
}