Create 3 seemeless looping Cinemographic Gifs from display output (I'll provide the data)

I have shader code which continuously generates output, I need a GIF of each of the Shader video that blends seamlessly. That is, I need the beginning and end of the GIF to blend it can't be noticed when the loop starts again. For example see here: [login to view URL] Notice how the water in the fixed example is much more smooth. I've attached small GIF samples, they are not those that need to be blended, they are just examples; it will be up to you the to pick footage from the shader (which will be sent) continuous output which you need to blend the first and last frames to get a smooth looping GIF. In general the GIF should be: 920 (h) x 638 (w) 8-bit (256 colors) 18fps And ideally as little frames as possible that allow for the blending of the first and last frames to make a smooth GIF. The three examples are: (1) Bio (2) Galaxy of Universes (3) Space Clusters (1) and (2) will hopefully be simpler as they are cyclic. (1) can be done by taking output of the Shader in which the "center" stays centered and can probably be looked after a few seconds. (2) is straightforward. (3) will be more difficult as lots of randomization is included in the "cluster" development, but I'm okay with possibly, after several seconds, to have the last several frames morph into the initial frames - or possibly using other image transition techniques as long as the effect gives a smooth transition (check with me first though). Brian