What is the difference between progressive rhythm and alternating rhythm in art? and what are the definitions of them?

What is repetition, pattern, and rhythm?  How do they relate to each other?

Repetition refers to one object or shape repeated; pattern is a combination of elements or shapes repeated in a recurring and regular arrangement; rhythm--is a combination of elements repeated, but with variations.This scroll includes all three of these elements: repetition, rhythm, and pattern. Repetition is seen throughout the mandala in the repetition of figures. This is most evident in the center and the area immediately surrounding the center of the mandala. Pattern can be found in the areas where there are repeated figures that are different in size but follow a regular, ordered arrangement in their recurrence. Rhythm can be seen in the two outermost layers, especially the second one from the edge, with a black background.  Differing sizes of similar figures are repeated, with variations in their order and grouping

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