What Is It Called When You Draw Without Lifting Your Pencil?

Understand everything surrounding What Is It Called When You Draw Without Lifting Your Pencil in this comprehensive guide.

And also gives us the solution for the fourth puzzle. For the path to be drawable with a single pencil according to our rules, it must have no more than two points with an odd number of edges touching them, and those two points are the beginning and end (or end and beginning).