int greenled = D0;
int whiteled = D6;
int orangeled = D7;

int brightness = 0;  // how bright the LED is
int fadeAmount = 5;  // how many points to fade the LED by




void setup() {
  pinMode(greenled, OUTPUT);
  pinMode(whiteled, OUTPUT);
  pinMode(orangeled, OUTPUT);
}

void loop() {
  // set the brightness of the leds
  analogWrite(greenled, brightness);
  analogWrite(whiteled, brightness);
  analogWrite(orangeled, brightness);

  // change the brightness for next time through the loop:
  brightness = brightness + fadeAmount;

  if (brightness <= 0 || brightness >= 255) {
    fadeAmount = -fadeAmount;
  }
  // wait for 30 milliseconds to see the dimming effect
  delay(30);
}