Using a black, hard crayon, put fifty small dots, at random, over the surface of the stone. Then connect each dot with a straight line.

Using a black, hard crayon, draw a twenty inch square. Divide this square into one inch squares. Within each one inch square, draw nothing, or draw a diagonal straight line from corner to corner, or two crossing straight lines diagonally from corner to corne

Using a black, hard crayon, draw a straight line of any length. From any point on that line draw another line perpendicular to the first. From any point on the second line draw another line perpendicular to that line. Repeat this procedure

Using a black, hard crayon, draw four contiguous ten inch squares, forming one twenty inch square, divided into quarters. Within the first square (upper left) draw one line, one inch long. Within the second square (upper right) draw ten lines, each one inch long. Within the third square (lower left) draw one hundred lines, each one inch long. Within the fourth square, (lower right) draw one thousand lines, each one inch long. All lines should be drawn at random and straight

Using a black, hard crayon, draw a twenty inch square. Divide this square into one inch squares. Within each one inch square draw nothing or a free-hand line or lines.