Maybe you aren't using the correct dream pieces.

To make red you need a red and a clear together.
To make purple you need red and blue together
To make green you need blue and yellow together.

Ana

I went to the walkthrough. It doesn't tell you how many times to turn the dream pieces to get the correct color combinations.
Or which one to turn first.

It does not matter marie, you only need to pick the dream pieces that have the right colored jewels in them and then match them up as I have listed.