Adding library'problem

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Now I did it and is working fine, thanks, could you help me with somethin else?

I got this interrupt that is for a ultrasonic sensor, bu the ultrasonic needs a delay between two lines, one turns on and the otherone turns off the sound, but how could I do that delay inside the interrupt?

void ataque()
{
  int i = 0;
  digitalWrite(Vdd,HIGH);
  int duration, distance;
  digitalWrite(trig, HIGH);
 delayMicroseconds(1000)
  digitalWrite(trig, LOW);
  duration = pulseIn(echo, HIGH);
  distance = (duration/2) / 29.1;
  if (distance < 20)
  {
    Serial.println(distance);
    
    Derecho.write(180);
    Izquierdo.write(0);


  } 
}

Because I'm allways reading 0 distance, and perhaps is because of it...