Genius

Definitely not me. 

42 images went into this (slightly 'meh') attempt at a composite long exposure. Rather more than I really wanted to type in the individual layer opacity values for. There's an option to automate tasks using a python programming window, if you know what to do. Which I don't. Stumped for ages.

Then my colleague arrived for the start of his shift (of no work at present). He writes code in python for fun - 30 minutes and he'd come up with the answer (which I would never, ever have got anywhere near). 

Genius.