q life.q -p 5000
You can tweak the rendering speed by changing \t and the size by changing the values passed to R when initializing board.
Compare life with these alternate implementations found at Game of Life in (one line of) q
life:{any(1b;x)&'3 4=\:sum sum f(f:rotate'\:[1 0 -1])x} / by Aaron Davies
life:{any(1;x)&3 4=\:2 sum/2(1 0 -1 rotate'\:)/x} / by Attila Vrabecz
life:{(3=a)|x&4=a:2 sum/2 rotate'\:[1 0 -1]/x} / by Attila Vrabecz
life:{3=a-x*4=a:2 sum/2(1 0 -1 rotate'\:)/x} / by Attila Vrabecz
life:{0<x+0 1@4-2 sum/2(1 0 -1 rotate'\:)/x} / by Swee Heng