How to create 'chasing' leds?

I seen this video by someone who used Simhub to create a a 'chasing' led effect that moves from one side to the other and then back again, a single time when the car is started (please see video)

How can I program this 'chasing' led to go from one side to the other a single time like the video?

Video: https://www.reddit.com/r/simracing/comments/sbku2a/a_few_people_messaged_me_and_asked_to_see_a_video/