Dancing Yellow Poster

Optical Illusion : Each person may have another way to trigger an optical effect in this image. One way is to change the distance between the eyes and the image back and forth, while watching the centre of the image. Another way is to just watch the green colours in the image. Or to see this image as truly an stage for dancing colours, especially yellow colours. You could also see an optical effect, if you would stare at the centre of the image and then move your eyes along the dotted colourless rays which seperate the colourful parts, either horizontally, vertically or diagonally, while only indirectly observing the colourful rays. All of my images with optical effects could be viewed at : http://www.zazzle.com/mohsenart/gifts?cg=196904589798277291