Reversing, shifting and inverting a row
Remix a row: row.reverse() plays it backwards, row[-1:] + row[:-1] shifts it one step right, and checking for 0 instead of 1 plays the gaps.
Challenge A:row = [1, 0, 0, 1, 1, 0, 0, 0]. Flip it with row.reverse(), then play the kick on every 1.