Arduino script used for lighting up the shoulders and headphones of the DJ Yonder cosplay...

dj_yonder.ino

#include <FastLED.h>

//Using these LEDs: https://amzn.to/2qkaduF
//INVOLT WS2812B LED Strip Individually Addressable 60LED/M 3.2FT 1M, No Waterproof Flexible for DIY Decoration, DC 5V with Smart IC Chip Built-in Self Adhesive

#define LED_PIN     3  //Using pin 3 on an Adafruit Pro Trinket - 3V 12MHz: https://amzn.to/2yKQMQp
#define NUM_LEDS    52 //Didn't use all the LEDs in the strip
#define LED_TYPE    WS2812B
#define COLOR_ORDER GRB
#define BRIGHTNESS  255

//I'm using a cellphone battery pack (for portable charging your cellphone).
//If there isn't enough current draw, it automatically turns off...
//For what I'm using, these brightness settings kept the battery pack turned on.
int MAX_BRIGHTNESS = 30;
int MIN_BRIGHTNESS = 10;

unsigned long shoulder_time = 0;
int shoulder_delay_interval = 0;
int shoulder_delays[] = {100, 100, 50, 50, 50};
int shoulder_loop = 0;
int min_shoulder_loop[] = {11, 12, 13, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

unsigned long ear_time = 0;
int ear_delay = 50;
int ear_loop = 0;
int min_ear_loop[] = {37, 38, 39, 28, 29, 30, 31, 32, 33, 34, 34, 36};
//I accidentally adhered these backwards on the Left ear. To make it easier
//I'm creating a static left ear loop for setting the min brightness
int min_left_ear_loop[] = {42, 41, 40, 51, 50, 49, 48, 47, 46, 45, 44, 43};

CRGB leds[NUM_LEDS];

// Colors from: https://htmlcolorcodes.com/color-names/

void setup() {
  LEDS.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>( leds, NUM_LEDS );
  FastLED.setBrightness( BRIGHTNESS );
  
  //Right Shoulder
  for ( int i = 0; i <= 7; i++ ) {
    leds[i] = CRGB::HotPink;
  }
  leds[8] = CRGB::DeepSkyBlue;
  leds[9] = CRGB::DeepSkyBlue;
  leds[10] = CRGB::Lime;
  leds[11] = CRGB::Lime;
  leds[12] = CRGB::Gold;
  leds[13] = CRGB::Gold;
  
  //Left Shoulder
  for ( int i = 14; i <= 21; i++ ) {
    leds[i] = CRGB::HotPink;
  }
  leds[22] = CRGB::DeepSkyBlue;
  leds[23] = CRGB::DeepSkyBlue;
  leds[24] = CRGB::Lime;
  leds[25] = CRGB::Lime;
  leds[26] = CRGB::Gold;
  leds[27] = CRGB::Gold;
  
  //Right Ear
  leds[28] = CRGB::HotPink;
  leds[29] = CRGB::DeepSkyBlue;
  leds[30] = CRGB::HotPink;
  leds[31] = CRGB::Gold;
  leds[32] = CRGB::DeepSkyBlue;
  leds[33] = CRGB::HotPink;
  leds[34] = CRGB::HotPink;
  leds[35] = CRGB::DeepSkyBlue;
  leds[36] = CRGB::Gold;
  leds[37] = CRGB::Lime;
  leds[38] = CRGB::HotPink;
  leds[39] = CRGB::Lime;
  
  //Left Ear
  //Wired backwards... so same colors, but reverse order as the Right ear... meh
  leds[40] = CRGB::Lime;
  leds[41] = CRGB::HotPink;
  leds[42] = CRGB::Lime;
  leds[43] = CRGB::Gold;
  leds[44] = CRGB::DeepSkyBlue;
  leds[45] = CRGB::HotPink;
  leds[46] = CRGB::HotPink;
  leds[47] = CRGB::DeepSkyBlue;
  leds[48] = CRGB::Gold;
  leds[49] = CRGB::HotPink;
  leds[50] = CRGB::DeepSkyBlue;
  leds[51] = CRGB::HotPink;
  
  for ( int i = 0; i <= 51; i++ ) {
    leds[i].maximizeBrightness( MIN_BRIGHTNESS );
  }
  
  FastLED.show();
}

void loop() {
  // Shoulders: LED 0 - 27 (28 LEDS )
  // Ears: LED 28 - 51 (24 LEDS )
  // 52 LEDs total
  // Good article on using millis() instead of delay() for non-blocking actions, like we need for this cosplay
  // https://www.norwegiancreations.com/2017/09/arduino-tutorial-using-millis-instead-of-delay/
  
  //Shoulders
  if ( shoulder_loop > 13 ) {
    shoulder_loop = 0;
    shoulder_delay_interval++;
  }
  
  if ( shoulder_delay_interval > 5 ) {
    shoulder_delay_interval = 0;
  }

  if ( millis() > shoulder_time + shoulder_delays[ shoulder_delay_interval ] ) {
    leds[shoulder_loop].maximizeBrightness( MAX_BRIGHTNESS ); //Right Shoulder
    leds[shoulder_loop + 14].maximizeBrightness( MAX_BRIGHTNESS ); //Left Shoulder
    leds[min_shoulder_loop[shoulder_loop]].maximizeBrightness( MIN_BRIGHTNESS ); //Right Shoulder
    leds[min_shoulder_loop[shoulder_loop] + 14].maximizeBrightness( MIN_BRIGHTNESS ); //Left Shoulder
    shoulder_loop++;
    shoulder_time = millis();
  }
  
  //Ears
  if ( ear_loop > 11 ) {
    ear_loop = 0;
  }

  if ( millis() > ear_time + ear_delay ) {
    leds[ear_loop + 28].maximizeBrightness( MAX_BRIGHTNESS ); //Right Ear
    leds[51 - ear_loop].maximizeBrightness( MAX_BRIGHTNESS ); //Left Ear
    leds[min_ear_loop[ear_loop]].maximizeBrightness( MIN_BRIGHTNESS ); //Right Ear
    leds[min_left_ear_loop[ear_loop]].maximizeBrightness( MIN_BRIGHTNESS ); //Left Ear 
    ear_loop++;
    ear_time = millis();
  }
  
  FastLED.show();
}