Wall Drawing 289:
A 6-inch (15 cm) grid covering each of the four black walls.
White lines to points on the grids. Fourth wall: twenty-four lines from the center, twelve lines from the midpoint of each of the sides, twelve lines from each corner.
(The length of the lines and their placement are determined by the drafter.)
To reimplement wall drawing 289, I think the most efficient way to do this is as follows. In JS, get the size of the drawable canvas, then subdivide into an n by n grid. Then calculate coordinates of corner points, and midpoints for top left right and bottom. Next, use a function to draw a rayCast of random magnitude from that point to a random point on the grid.