Arrange 16 items in 15 lines of 4

A popular puzzle asks you to arrange 10 items in 5 lines of 4. The solution is to place them at the intersections of a 5-pointed star, or pentagram. Each of the 5 lines of the star contains two outside vertices and two vertices of the inner pentagon.

Somebody asked me to arrange 16 things in 15 lines of 4. Click here to see how I did it.