void Update()
{
if (durationToSoundLiftoff < 0.0f)
{
durationToSoundLiftoff = randomFloat(minDurationToSound, maxDurationToSound);
}
if (stopWatch.execeedesMilliseconds((int)durationToSoundLiftoff))
{
AudioSource liftoffSound = GetComponent <AudioSource>();
liftoffSound.Play();
durationToSoundLiftoff = -1.0f;
stopWatch.reset();
}
}