Changing colors and fading for specific time with millis

Other Hardware LEDs and Multiplexing
18

Oh, you should have asked about arrays before doing that pain in the ass typing.

There's FastLED.fill_solid(), and if you set up an array lper Replacing FASTLED colour name with an array index - #2 by gfvalvo

uint32_t colors[] = {FastLED::CRGB(9, 151, 95),
                     FastLED::CRGB(0, 255, 50),
                     ...
                     FastLED::CRGB(223, 255, 0)};

you can then have just three chunks:

if(color>=61) {
  color = 1;
   interval = 0;
}
switch ((color%3)+1) {

  case 1:
    FastLED.fill_solid(leds, NUM_LEDS, colors[(color-1)%3] );
    FastLED.setBrightness(brightness);
    FastLED.show();
    interval = fadeTime;
    brightness = brightness + fadeStep;
    if(brightness == 130){
      color++;
    }
  break;

  case 2:
    FastLED.fill_solid(leds, NUM_LEDS, colors[(color-1)%3] );
    FastLED.setBrightness(brightness);
    FastLED.show();
    interval = period2;
    color++;
  break;

  case 3:
    FastLED.fill_solid(leds, NUM_LEDS, colors[(color-1)%3] );
    FastLED.setBrightness(brightness);
    FastLED.show();
    interval = fadeTime;
    brightness = brightness - fadeStep;
    if(brightness == 0){
      color++;
    }
  break;
}