//Setup the pins for the MOSFET Gates
const int LED_WHITE = 2;
const int LED_UV = 4;

int max_threshold = 1000;
int max_cycle = 5000;
int num_cycles = 1;

uint16_t cycle,cycles,threshold;

void setup() {
  // put your setup code here, to run once:
  pinMode(LED_WHITE, OUTPUT);
  pinMode(LED_UV, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  while(1) {
      for (threshold = 0; threshold < max_threshold; ++threshold) {
         for (cycles = 0; cycles < num_cycles; ++cycles) {
            for (cycle = 0; cycle < threshold; ++cycle)
               digitalWrite(LED_WHITE, HIGH);
            for (cycle = threshold; cycle < max_cycle; ++cycle)
               digitalWrite(LED_WHITE, LOW);
            }
         }
      for (threshold = max_threshold; threshold > 0; --threshold) {
         for (cycles = 0; cycles < num_cycles; ++cycles) {
            for (cycle = 0; cycle < threshold; ++cycle)
               digitalWrite(LED_WHITE, HIGH);
            for (cycle = threshold; cycle < max_cycle; ++cycle)
               digitalWrite(LED_WHITE, LOW);
            }
         }
      }

}