nope, sorry, patterns are not available in 0.5.4.

this is certainly possible to code, and i might add something like it eventually. {in fact, you used to be able to specify arbitrary patterns like hold up, double-tap down, release up, but it was too complicated, both in the code, and in the complex hand maneuvering. the way it is now, with default timeouts, i dont make mistakes. with the patterns and the rigorous timeouts needed to make sure overlapping patterns work, i fukt up more often than i actually clicked it correctly}

personally, i like triple-tap-up for snapshot, but i dont think i could do it in 1/4 of a second. {for my double/triple timeouts, i use 400ms/600ms.} so far, ive managed to use it several times to great success, but just as often im too slow to capture the Moment.
you might also want to consider double-tap lock.