top row, left to right:

v72-120 random densities, directions/I
4 paper elements (1 × 2 cm) arranged with at random selected direction (in °) at the center of the squares of a 2 × 2 (25 × 25 cm) grid

v72-121 random densities, directions/II
elements (1 × 2 cm) arranged with at random selected direction (in °) at the center of a 4 × 4 squares (12.5 × 12.5 cm) grid

v72-122 random densities, directions/III
elements (1 × 2 cm) arranged with at random selected direction (in °) at the center of 8 × 8 squares (6.25 × 6.25 cm) grid

v72-123 random densities, directions/IV
elements (1 × 2 cm) arranged with at random selected direction (in °) on the (7 × 7) intersections of the lines of a 6.25 × 6.25 cm grid

2nd row, left to right:

v72-124 random densities, directions/V
elements (1 × 6 cm) arranged with at random selected direction (in °) on the (7 × 7) intersections of the lines of a 6.25 × 6.25 cm grid (overlap not allowed) [program as v72-123]

v72-125 random densities, directions/VI
elements (1 × 6 cm) arranged with at random selected direction (in °) on the (7 × 7) intersections of the lines of a 6.25 × 6.25 cm grid (overlap allowed) [program as v72-124]

v72-126 random densities, directions/VII
elements (1 × 12 cm) arranged with at random selected direction (in °) on the (7 × 7) intersections of the lines of a 6.25 × 6.25 cm grid (overlap allowed) [program as v72-125]

v72-127 random densities, directions/VIII
elements (1 × 2 cm) arranged with at random selected direction (in °) on the (3 × 3) intersections of the lines of a 12.5 × 12.5 cm grid (overlap allowed) [program as v72-126]