Complex sentence: The first shot after the opening credits, which involved dripping water, was something Anderson wanted to include to create a "continuation of sound, rhythmic sound", because it was important for the musical part of the show.
Split into simpler sentences: The first shot after the opening credits, which involved the dripping water, was something Anderson wanted to include to create a "continuation of sound, rhythmic sound". She added that it was important for the musical part of the show.