Tetrad

Linen Canvas: 690mm high x 690mm wide

1 of 11 variations. Basic unit, width half height; outlined by equally spaced dots, horizontal space between dots is half that of verticals.  Seventeen layers of dots from 1 at the top -9 then back to 1 dot.   Next to end dots go up one eighth of the way to the layer of dots above it. As horizontal line of dots progresses  each grows by one eighth until middle line of middle layer touches bottom line above, then, vertical lines decrease again.

Four rhomboids cross each other equally giving interesting internal shapes.