Pool: Tangled - Episode 17 Painter's Block (disney)

after the events of the blizzard in the previous episode Rapunzel is really struggling with the consequences her actions have and is starting to doubt every decision she makes, even with something as simple as painting.

An art teacher by the name of Mrs. Sugarby offers to help Rapunzel with her painting, but starts preying on Rapunzel's doubts and her fear of making tough decisions. The hypnosis method is a staff tapping the floor like a metronome, combined with the assurance that she won't need to make tough decisions anymore.

This is all a ploy for Sugarby (whose real name is Sugracha) to use Rapunzel's painting skill to help break the seal that's holding her demon master (likely the series villain, though he was just introduced) in another dimension.