May 2013 - the 7 elements of design, see other monthly challengers here...

The 7 elements of design: form, shape, line, space, value, color and texture.

Line: Graphic Unifier, Curved, Straight. Directional Thrust: Horizontal, Vertical, and Diagonal
Shape: Naturalistic, Geometric
Space /Size: Large, Medium, Small, Proportion or Scale
Value: Light, Dark
Color: Hue, Chroma, and Value
Texture: Rough, Smooth, Soft, Hard
Form: Shape with depth