I tried out a beaded crochet pattern that looked good on paper, but was too complicated, so the piece I worked looked muddled. I didn't think it was worth working more than a couple of repeats as a sample. As Mary Corbet says in this post, trying something out and finding it doesn't work is by no means a waste of time. I did write myself a note on the pattern, because if I tried it out again, that would indeed be a waste of time!
I'm working on a simpler pattern, which, to me, works much better: