byte digital_led=3;
byte analog_led =4;

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

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(digital_led, HIGH);
analogWrite(analog_led,255);
delay(500);
digitalWrite(digital_led, LOW);
analogWrite(analog_led,210);
delay(500);
digitalWrite(digital_led, HIGH);
analogWrite(analog_led,150);
delay(500);
digitalWrite(digital_led, LOW);
analogWrite(analog_led,100);
delay(500);
digitalWrite(digital_led, HIGH);
analogWrite(analog_led,50);
delay(500);
digitalWrite(digital_led, LOW);
analogWrite(analog_led,0);
delay(500);
}