It’s alarmingly simple - a 52 x 90 grid, which represents your life, assuming you life to be 90. Each square is a week.
I found it a bit of a gut punch to see my weeks splayed out like that. The phrase “it really puts things in perspective” is an overused cliché, but this does just that. You literally see your life from another perspective. And in some ways, it is horrifying.