types of patterns
linear patterns (ribbons)
Linear pattern is a continuous design, that can be expanded on two sides.
Linear patterns make nice borders and dividers between other patterns.
The pattern follows the direction of the shape, containing the design - like a pattern on a ribbon follows the ribbon.
radial patterns (center-based designs)
Radial patterns are symmetrical designs, that have a center and can expand indefinitely in all four directions.
Mandala is a good example of a radial design.
These designs can fit in a circle or a square.
Additional details can be added to a symmetrical design to make it more interesting.
grid patterns (wallpaper)
Grid patterns are based on grid structure.
Grid patterns can be expanded in all four directions.
The patterns can be flexible and "follow" or "wrap around" the forms that they drawn on.
free-form designs and patterns
Free-form patterns have no rules.
You can vary the size, the shape, the position, etc. of the design.