conundrum

I have the great fortune to work in a job where if it gets slow and I run out of extra projects to work on I can knit at my desk. Right now I've only got so much extra yarn with me. I've got tons sitting in a bag under my desk but it's all for my blanket (which is now too big to work on at work)and I'm afraid that if I use any I won't have enough to finish the project. So now to figure out a pattern that I can do with one ball of bulky yarn.