i did.
not 100% happy with the result (a bit too fast toggling in my opinion), but it seems to work.
used 2 delay circuits on the "Major" connections - first between the internal light and the middle, second between the the middle and the outer light.
you'll need to change the light socket of the internal light to dual functionality (just like the middle and the outer).
the delay circuits are available on ebay or aliexpress.
something like this:
https://www.aliexpress.com/item/100...earchweb0_0,searchweb201602_,searchweb201603_
i've also changed the bulbs to LEDs (thus the rapid flashing).
added some load resistors to the "Minor" connection - so the turning lights will be visible better when running lights are ON (same light bulbs / LEDs are used for both).
i think the same "recipe" can be applied to horizontal (just noticed that)...