Pick a number in the top row. This is your magic number. Go that many numbers to the right. The number you arrive at is your new magic number. Repeat. You will (almost) always end up at the red number. The first person to explain how this works wins a virtual waffle.
This trick was made by Martin Kruskal (https://en.wikipedia.org/wiki/Martin_David_Kruskal) Yes, the numbers are chosen randomly. If it doesn't work, please don't comment-there is a small chance of that happening.