interleave

I want you to write a function that accepts two lists and returns a new iterable with each of the given items "interleaved" (item 0 from iterable 1, then item 0 from iterable 2, then item 1 from iterable 1, and so on).

Here's an example (which returns lists):

>>> interleave([1, 2, 3, 4], [5, 6, 7, 8])
[1, 5, 2, 6, 3, 7, 4, 8]

I want you to assume that the lists have the same length. Don't worry at all about what to do with different length lists. We'll actually handle that in a future exercise.

See if you can figure out at least one of the bonuses for this exercise if you have time.

Bonus 1