Along the lines of what's being discussed here: www.aypsite.org/forum/topic....ichpage=2#top I came across this, and thought it was interesting. You have to be patient, but the colors do change. (I'm just copying it here - I didn't write it).
(Please note - the writing you see in the beginning will change to a color. Takes about a minute).
THIS IS A COLOR TUNING SYSTEM WHICH I MADE FOR MYSELF. IT HELPS TUNE UP THE CHAKRA ENERGY ZONES BASED ON THE ENERGY OF COLOR. I AM REIKI LEVEL 2 CERTIFIED AND MADE THIS TO HELP CLEAR MY ZONES. I AM MAKING IT AVAILABLE TO THE OPEN PUBLIC.
IT IS DESIGNED TO CLEAR FROM THE CROWN GOING DOWNWARD. THIS IS BECAUSE MY FOCAL POINT IS MORE IN THE UPPER REGION THAN THE LOWER.
COPY THE URL LISTED ABOVE INTO YOUR ADDRESS BAR OF YOUR BROWSER. FOLLOW INSTRUCTIONS. YOU MAY ALSO COPY THE FILE BY RIGHT CLICKING ON IT. IT IS A GIF ANIMATION.
I think what this is all about is the complimentary colour flashing up. If you gaze at the circle for a bit then look to the right at the blank space you will see what i mean.
Its used a lot to bring about light trance in other Spiritual practices particularly Cabala and Tibetan Buddhism the coloured symbols used are called Tattvas.
As a topic it should really be discussed over in Other Forms of Spiritual Practice so if you want to go there......