An introductory web document by Ralph Griswold on building patterns by overlaying grids of cells with increasing separation, following a scheme in Stephen Wolfram's A New Kind of Science. It shows the basic scheme (black cells separated by growing numbers of white rows and columns, combined with logical or), then generalizations: different motifs, prime-number separations, exclusive or, and repeating motif sequences. It notes that the resulting patterns have floats and are only partly usable as drawdowns, and it promises a follow-up article.