What is the primitive art thing used for

Hint 1 of 7:

Save your game and go to the top of the mountain.

Hint 2 of 7:

And push the boulder over the side.

Hint 3 of 7:

The art can be adjusted.

Hint 4 of 7:

Push the primitive art thing two times.

Hint 5 of 7:

And push a boulder over the side again.

Hint 6 of 7:

Go down to the beach and see what has happened.