Introduction[]
I Found The Pattern! is an Achievement in Run 3.
Suggested Characters: 
Gameplay[]
You can use any character, but the Bunny, Student, and Child work really well here.
The pattern is that the dark tiles are behind the light tiles. Touch the black tiles, and avoid the lit ones. Know that there are no dark tiles in front of the lit ones. If you just keep this in mind while attempting the achievement, you should get this very easily.