G100F1

click image for larger view

Each of the 60 square grids is identified using a base two binary numbering system. The six binary number symbols appear on the bottom grid bars along the horizontal axis. Zero is represented by a short pillar and one by a longer pillar. Below is an enlarged view of the grid, no.9 is represented by - a long pillar at the extreme right representing decimal 1 and a long pillar fourth from the right representing decimal 8.