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Name	quad()
Examples	quad(38, 31, 86, 20, 69, 63, 30, 76);
Description	A quad is a quadrilateral, a four sided polygon. It is similar to a rectangle, but the angles between its edges are not constrained to ninety degrees. The first pair of parameters (x1,y1) sets the first vertex and the subsequent pairs should proceed clockwise or counter-clockwise around the defined shape.
Syntax	quad(x1, y1, x2, y2, x3, y3, x4, y4)
Parameters	x1 float: x-coordinate of the first corner y1 float: y-coordinate of the first corner x2 float: x-coordinate of the second corner y2 float: y-coordinate of the second corner x3 float: x-coordinate of the third corner y3 float: y-coordinate of the third corner x4 float: x-coordinate of the fourth corner y4 float: y-coordinate of the fourth corner
Returns	void