Well.. if you think about it.. any image can be turned into a pattern, if that is what you're looking for.
Copy image "A"
Paste image "A" and mirror it once so that you have image "B"
Copy both images "A" and "B"
Paste image "A" and "B" below the existing "A" and "B" and then flip the image so that you have images "C" and "D"
Add all four of them together and they merge seemlessly ("E")
Repeat and Repeat and/or modify the image ("F") so that you don't have the same repetative pattern happening (unless the pattern style is what you're looking for).
Hope this helps.