Kev, it's actually very easy. I use Paint Shop Pro for all my imaging needs (it's a great application for the price). I simply use the "freehand" selector to highlight the water area of the picture ... then apply a "wave" effect ... save this as the 1st image ... undo the wave effect ... apply the wave effect again but increasing the parameters just a bit so that the wave result is slightly different ... save this as the 2nd image ... then create the animated GIF with the two images.