But it serves a practical purpose as well. In >>101 >>110 the rendering was constrained by the available Unicode characters and the means of combining them. As a result the carpet does not show through in the half-empty cells of the Sierpinski triangle, which is inelegant. Rendering the Sierpinski triangle over the carpet over the flower garden will provide one solution to this issue, by allowing the carpet to show through in the half-empty cells.
The demos will be built up progressively to that point to make them easier to follow.