I'll give it a try. This one also uses graphics, but I'll hope my verbal description is clear enough so you can follow along at home.

Lay out a simple grid of nine dots in three by three pattern. This will be a square, three dots across, three dots down, one dot in the center, which could be construed to composed of four squares (this second description is just to help clarify, it's a basic 3x3 grid).

With your pencil, draw four connected line segments so that each dot has a line through it. You need to make angles (turn corners) between the four segments, but they must be connected, a continuous line without lifting the pencil. Obviously the line is not straight, as it has folds (angles) in it, but each of the four segments must be straight. If you then unfolded the line, you would have nine dots on the line, like a string of pearls. The line may cross over itself.

I hope that's clear. Have fun!