Add wave pattern

Signed-off-by: Paul Brook <paul@nowt.org>
Speed up box flip

Signed-off-by: Paul Brook <paul@nowt.org>
Speed up fireworks

Signed-off-by: Paul Brook <paul@nowt.org>
Add cubezoom pattern
Merge pull request #10 from ultrafez/pattern-cubezoom

Add cubezoom pattern
Corner fill working
Refactor to de-duplicate code
Guarantee that the same colour isn't used twice