Take a break and empty your mind of it. Sometimes when the pattern doesn't seem to make sense, I go through it almost backwards. The block looks like this when finished. I take out my graph paper and do it as if there was no pattern and I have to do it all myself. Then compare what I come up with to what the pattern says. Usually this helps me get into the thought process the designer used. Sometimes it is just a difference in how people think. After all, we all know that all computer user manuals are written backwards--to find out how do something, you need to know what they call it.