PLAS371 - This one wins the prize.   It sets all the corners to the same
          value, and doesn't seed the RNG, but we have to say it counts,
          since there's no human-detectable differences between this one
          and the original (except for a bug fix).  This one generates a
          different plasma every time, even though it does not appear to
          seed the RNG!

PLAS390 - This one came in second.  It uses a very interesting algorithm
          with return chains eliminating many of the CALLs.   It is also
          the only one that is fully commented.   This is actually a bit
          better algorithm, but he did not think of the slightly smaller
          RNG, and the idea of setting the corners to the same value, so
          it fails to win the contest.  It could be reduced to under 370
          bytes by using some of the tricks in PLAS371.

PLAS335 - This one is smaller than the others but is way too different
          than the original, so it didn't win.  It's interesting though.