Red8

The rules are very simple. Tap to turn each of the 8 lights from red to green.

It starts with 8 red lights. The aim is to turn the 8 lights green in 170 moves. You will find that doing it in less than a 1000 moves challenging.

Tap the correct light to change its color. Only one or two lights are active at any time.

The key is to observe the pattern.