CycleColormap
CycleColormap() displaces an image's colormap by a given number of positions. If you cycle the colormap a number of times you can produce a psychodelic effect.
The format of the CycleColormapImage method is:
MagickBooleanType CycleColormapImage(Image *image,const long displace)
A description of each parameter follows:
image
the image.
displace
displace the colormap this amount.