Natural patterns and sudoku

Nature has given animals, birds, and plants certain symmetrical features. That is, the left and the right sides look almost identical. I perceive this as one of the specific patterns or systems produced by our mother nature. In fact, the world around us is full of [天然圖案], natural patterns. Many of them are delightful to look at.

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[img_assist|fid=259|thumb=0|alt=extendhand]

Pay a visit to any natural location, a plain, a plateau, a highland. You will find insects of all kinds. Butterflies, beetles, moths and many more, all have beautiful , colourful patterns on their bodies and wings. These are fascinating arts not produced by any human hand or machine. Huge mountains, trees, and rivers or lakes altogeher form harmonious views before our eyes. No artist in the can ever make such an enormous, 3-D master piece.

Here is the explanation of the phrase [天然圖案] which is imprinted on the picture above.
Separately 天 means [sky] which I have covered before.
然 = but, correct , just like that.
But when the two put together in context, they refer to something quite different.
天 + 然 = natural, not produced by hand or machine, not artificial

圖 = picture, intention,
案 = table, case
and 圖 + 案 = pattern

Photo sectionL
[img_assist|fid=262|thumb=0|alt=flowers|caption=Flower patches form natural patterns all over the greenland]

[img_assist|fid=265|thumb=0|alt=mountain130|caption=No symmetrical feature here, but the view is gorgeous.]

Play time: Here is a Sudoku puzzle for you to try

[img_assist|fid=268|thumb=0|alt=sukoku]