You simply use any effect you want over the initial blank image. Resizing the 1x1.gif larger once inside to be able to composite "tile across" and any composite effect. Paint, draw, and roll all are great effects to use too. If you use an IM input image, you should make it small to start with (20x20)... temporaraily out put it.. grab that URL and then back in to begin your maniulation.

The following images are examples of Tiger Lily's class on creating via IM.. Stranjer's "Art From Nothing/Abstracts" shows more examples and ideas.. any of mine can be used as is, cropped or manipulated as you desire. If used "as is".. a link back to my site would be appreciated but is not necessary.