It is possible to move the wave source generating the wave and the position of the observer to a desired position
You can control the time of occurrence of the source.

You can also move the source and viewers.

Check the Doppler effect by generating a source and moving the source towards or away from the observer.
You can also see the Doppler effect by moving the observer.

I made a sound when the wave and the observer collided. Even if you only hear the sound, you can experience the Doppler effect.