The light seems to run as the LEDs glow one after the other. I’ve used a 555 timer IC and a CD4017 decade counter.https://www.youtube.com/watch?v=pIvYD3gKKzc
that’s cool!
This way, by building circuits like this, is how I started with electronics. Learning a lot about how circuits are working and by reading datasheets… They have a lot of useful info.
Good job! Go on further.
A next step what you could make is to add some diodes and make a 6 led knightrider.