Sol Lewitt's artistic work "Wall Drawing 797" is quite literally an algorithm, not a painting. That is, when we view an example of Wall Drawing 797...of which there have been more than one...we are seeing the result of somebody (not Sol Lewitt himself) following the instructions of the algorithm.
First we are going to recreate our own "Wall Drawing 797" in the classroom, either on paper or on a whiteboard, taking turns drawing the lines. This is our chance to de-bug our algorithm by making mistakes and discussing how to improve it.
Next we are going to take this project outside, and not only do it on a larger scale (probably using sidewalk chalk) but also by asking strangers to follow our algorithm.