This was the same solution that I used but for some reason mine requires an index signiture, was this changed recently or is there a way to change the config so typescript is not is strict?

Nice annotating/commenting habits

Clean code is always nice too look at. Professional looking code.

ciekawe podejscie

"s:str" represents that the given paramater is a string and "-> str" represents that the function returns a string

Finally a typing enjoyer such as myself!!!

Genius

if you have your order the other way, with red, yellow, green then you can do index - 1, and you won't hit your error - because 0 - 1 is -1 and that gives you the last item in the list - which is green, and the correct value.

It's an import for typing added in signature of the method.

But it does, that's type hinting, it's not enforced. I wouldn't use it in this case because it's misleading.

It doesn't work with non-integers.

can you add explanation why did you use import List etc

bit slow

(time/2) ?