StrangerThingsLoop.c

EVERY_N_MILLISECONDS(PAUSE) { 
  uint8_t color;

  if((pos % 2) && (pos <= (msglen * 2))) {
    char letter = msg[pos/2];
    char mapped = mapChar(letter);

//      Serial.printf("pos: %d, char: %c, num: %d\n", pos, letter, mapped);

    if(mapped > 0) {
      ledNo = MAP[mapped];

      color = (ledNo % 4);

      switch(color) {
        case 0: leds[ledNo] *= 10; break;
        case 1: leds[ledNo] *= 10; break;
        case 2: leds[ledNo] *= 10; break;
        case 3: leds[ledNo] *= 10; break;
      }                 
    }
  } 
  else { 
    for(int i=0; i<NUMLEDS; i += 1) {
      color = (i % 4);

      switch(color) {
        case 0: leds[i] = CRGB(0, 0, BRIGHT); break;
        case 1: leds[i] = CRGB(0, BRIGHT, 0); break;
        case 2: leds[i] = CRGB(BRIGHT, 0, 0); break;
        case 3: leds[i] = CRGB(BRIGHT, BRIGHT, 0); break;
      }
    }
  }

  FastLED.show();

  // Create a gap at the end of the message
  pos += 1;
  if(pos == (msglen * 2) + 4) {
    pos = 0;
  }
}