Consider concatMap

Use dropWhile to drop based on a specific condition

takeWhile returns the longers possible prefix that satisfies a condition
span does the same, but also returns the rest of the list (2 element tuple)

Cycle repeats a given sequence infinitely:
cycle [1,2,3] = [1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3]...

Repeat is like cycling a single element