B3313 | Peaceful Grounds green star

I saw people were having trouble getting this star, so here's a tutorial.
Peaceful Grounds (formerly known as Parallel Backyard) has one star in both UA and in 1.0. This is a tutorial on how to get the green star in 1.0.
There's a purple switch here that doesn't always appear (I think it only appears at night) but luckily you don't need to use it to get the star.
(And yes, the star on the thumbnail is yellow. That's just what green stars look like when you collect them, it's confusing.)