We had a repeat pattern workshop in uni, using the motifs that we produced a few weeks ago to make repeatable sections for screen printing. It is difficult to get a section that will easily repeat as the edges have to continue on to each other. For example the top edge would have to be a continuation of the bottom. The whole process is very confusing and requires more concentration that I possess. I found that it was easier for me to do a section in my sketchbook and then scan it and make it into a repeat in photoshop.
Marigold 