int ledblanco = 2;
int ledmorado = 5;

void setup() {
  pinMode(ledblanco, OUTPUT);
  pinMode(ledmorado, OUTPUT);
}

void loop() {
digitalWrite(ledblanco, HIGH  );
digitalWrite(ledmorado, HIGH );
delayMicroseconds(100);
digitalWrite(ledblanco, LOW  );
digitalWrite(ledmorado, LOW );
delayMicroseconds(100);
}