Rear wheel power spoke pattern
If you are only replacing the 4 broken spokes then you will need to duplicate the wheel's spoke pattern. 

If you are re-lacing the wheel with new spokes, a 3-cross spoke pattern is time proven pattern that is great for a first time wheel build. It is easy to implement, it builds a very strong wheel and it makes re-truing the wheel a straightforward.  All of these are great features for your first wheel build. 

After building, ride it a bit, and see how you did before trying to chase more exotic spoke patterns. 

My reading of Sheldon's  POWerwheel page is that the pattern is a bit of a joke, but may actually work.  Even if it does work, it wouldn't be a good first time build as tension the wheel would be more difficult than a standard symmetrical pattern such as a 3-cross.

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Update: check Jeffery Bell’s answer this was an April fools day joke (it’s a bit hard to spot now with all the ads, but at the bottom it is dated for April 1. Crazy that some have apparently tried the pattern  in real life.

Please give Jeffery an upvote.