So in the second starter circuit multiple LEDs are linked up and patterns created. The first one turns each LED on before turning each LED off. It uses an array and a couple of for loops. You can read the full explanation on ardx.org.
and this is the result
So for an alternative pattern you could write a binary counter which counts from 0 to any number less than 255 (we only have 8 bits so are limited to 255). Maybe an extension could be to add a red ‘overflow’ LED.
This is the code window.