int led = 2;
void setup() {
pinMode(led,OUTPUT);
}

void loop() {
analogWrite(led,127);
delay(500);
analogWrite(led,128);
delay(500);
digitalWrite(led, HIGH);
delayMicroseconds(500);
digitalWrite(led, LOW);
delay(1000);
digitalWrite(led, HIGH);
delayMicroseconds(500);
digitalWrite(led, LOW);
delay(1000);
}