Tetrad's mission is to provide quality software services for both-
the overseas and domestic markets.
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Tetrad: This scheme will consist of four colors
that are equally spaced on the color wheel.
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We demonstrate that Tetrad is an effective
and powerful statistical tool that can assist researchers in the iterative process of theory development.
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Rectangle Tetrad scheme: Just like square Tetrad,
after choosing the major colour, we draw a rectangle then it automatically selects the other three colours.
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Square Tetrad scheme: After choosing the major colour,
starting from there we draw a square on the colour wheel, then it automatically selects three other colours.