If you are looking for a to track your mortality:
A "Memento Mori" paper is often a grid of squares, where each square represents one week of a typical human life. You "fill in" one square every week to visualize how much time you have left [9, 11]. Free Downloads: Memento Mori 2 Free Download
Reddit communities often share free PDFs or links to open-source wallpaper generators [6, 10]. If you are looking for a to track