long findHeight() {
  Servo vertControl;
  vertControl.attach(vertServo);
  const long offset;
  long curr, start;
  int angle = 0;
  start = measurement();
  do{
    curr = measurement()
    angle++;
    vertControl.write(angle);
  } while(curr<122)

return tan(angle)*start;



long measurement(){
  long duration;
  pinMode(pingPin, OUTPUT);
  digitalWrite(pingPin, LOW);
  delayMicroseconds(2);
  digitalWrite(pingPin, HIGH);
  delayMicroseconds(5);
  digitalWrite(pingPin, LOW);
  pinMode(pingPin, INPUT);
  duration = pulseIn(pingPin, HIGH);
  return microsecondsToInches(duration);
}


long microsecondsToInches(long microseconds)
{
  // According to Parallax's datasheet for the PING))), there are
  // 73.746 microseconds per inch (i.e. sound travels at 1130 feet per
  // second).  This gives the distance travelled by the ping, outbound
  // and return, so we divide by 2 to get the distance of the obstacle.
  // See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf
  return microseconds / 74 / 2;
}