code seems to pause for no reason

Using Arduino Programming Questions
10

Let's look at a small section of your code

void loop()
{
  pingRight();
  rightDistance = microsecondsToCentimeters(durationRight);
  delay(300);
  pingLeft();
  leftDistance = microsecondsToCentimeters(durationLeft);
  delay(300);

Presumably the pingRight and pingLeft functions are meant to measure the distances right and left, but if you look at either of them they do not move the pan servo.