The expanded refresh function

refresh.ino

void refresh(){

 // Loop over each LED
 for (int cycle = 0; cycle < 16; cycle++) {

   for (int currentLed = 0; currentLed < NUMBER_OF_CONNECTED_LEDS; currentLed++) {
     int maskPosition = currentLed * 4;
     if (cycle == 1 && brightnessMask_layer1[maskPosition]) {
       turnOnLed(currentLed, 0);
     }
     else if ((cycle == 2 || cycle == 3) && brightnessMask_layer1[maskPosition+1]) {
       turnOnLed(currentLed, 0);
     }
     else if (cycle >= 4 && cycle <= 7 && brightnessMask_layer1[maskPosition+2]) {
       turnOnLed(currentLed, 0);
     }
     else if (cycle >= 8 && cycle <= 15 && brightnessMask_layer1[maskPosition+3]) {
       turnOnLed(currentLed, 0);
     }
   }

   for (int currentLed = 0; currentLed < NUMBER_OF_CONNECTED_LEDS; currentLed++) {
     int maskPosition = currentLed * 4;
     if (cycle == 1 && brightnessMask_layer2[maskPosition]) {
       turnOnLed(currentLed, 1);
     }
     else if ((cycle == 2 || cycle == 3) && brightnessMask_layer2[maskPosition+1]) {
       turnOnLed(currentLed, 1);
     }
     else if (cycle >= 4 && cycle <= 7 && brightnessMask_layer2[maskPosition+2]) {
       turnOnLed(currentLed, 1);
     }
     else if (cycle >= 8 && cycle <= 15 && brightnessMask_layer2[maskPosition+3]) {
       turnOnLed(currentLed, 1);
     }
   }

   for (int currentLed = 0; currentLed < NUMBER_OF_CONNECTED_LEDS; currentLed++) {
     int maskPosition = currentLed * 4;
     if (cycle == 1 && brightnessMask_layer3[maskPosition]) {
       turnOnLed(currentLed, 2);
     }
     else if ((cycle == 2 || cycle == 3) && brightnessMask_layer3[maskPosition+1]) {
       turnOnLed(currentLed, 2);
     }
     else if (cycle >= 4 && cycle <= 7 && brightnessMask_layer3[maskPosition+2]) {
       turnOnLed(currentLed, 2);
     }
     else if (cycle >= 8 && cycle <= 15 && brightnessMask_layer3[maskPosition+3]) {
       turnOnLed(currentLed, 2);
     }
   }
   
   for (int currentLed = 0; currentLed < NUMBER_OF_CONNECTED_LEDS; currentLed++) {
     int maskPosition = currentLed * 4;
     if (cycle == 1 && brightnessMask_layer4[maskPosition]) {
       turnOnLed(currentLed, 3);
     }
     else if ((cycle == 2 || cycle == 3) && brightnessMask_layer4[maskPosition+1]) {
       turnOnLed(currentLed, 3);
     }
     else if (cycle >= 4 && cycle <= 7 && brightnessMask_layer4[maskPosition+2]) {
       turnOnLed(currentLed, 3);
     }
     else if (cycle >= 8 && cycle <= 15 && brightnessMask_layer4[maskPosition+3]) {
       turnOnLed(currentLed, 3);
     }
   }
   clearLeds();
 }
 
}