Have you ever tried to draw something on a fogged-up window, messed it up, and had to wipe it out of existence? Today’s Meditation doesn’t have that problem.
According to the intro, you’re on a bus journey that has so far lasted four hours, moving further and further away from home. The destination is – sadly – unclear, although it’s making the protagonist nervous.
So you draw on the fogged-up window, and the protagonist hums, different notes for different drawings. If you want to actually draw something you have to be quick, because the fog returns and clears the slate, but that’s probably better for a nervous mind.