When you see the rainbow, go over it. Not under it. How does one go over the rainbow? Not sure. But do it. When you get over it, you'll understand the need to go *over* versus *under.* Go all the way past it, then when it's all the way behind you, keep going for a little bit more. If another rainbow appears, repeat the process. Once you reach the end, you'll have an idea for far you've come. Only then will you unlock the treasure. No one knows what the treasure is. Either nobody has ever received it or it varies from person to person. Not sure which. Anywho, good luck with it. It's somewhere over there. In that direction. I'm sure you'll figure it out.
-j