Fun and easy ... lol
The scale portion of your inquiry is really what increases the complexity. I don't mean by making it harder, but by the number of possible solutions you have to chose from to achieve the result you want. If you were just after lighting up the fuse in general, you could simplify it somewhat. Instead, for a scale result, you need to consider the number of LED's you need to match a scale solution, how many volts those will require in each circuit and how many circuits to duplicate the scale results you are after. Adding blinking into the mix for each circuit will complicate it further but there are a lot of various small timing circuits that could address it... it's just which one of the many to choose from is what complicates it.
A simpler solution that isn't completely scale would likely be easier. Just a single circuit for all of the LED's you need for the look and placement you want and leave out the blinking portion. This would just requiring knowing the end voltage you need and a bit of wiring to place the LED's where you'd like.