Draw a quad. A quad is a quadrilateral, a four sided polygon.
:x1 - The x-coordinate of the first point (number)
:y1 - The y-coordinate of the first point (number)
:x2 - The x-coordinate of the second point (number)
:y2 - The y-coordinate of the second point (number)
:x3 - The x-coordinate of the third point (number)
:y3 - The y-coordinate of the third point (number)
:x4 - The x-coordinate of the fourth point (number)
:y4 - The y-coordinate of the fourth point (number)
[:quad {:x1 50, :y1 55, :x2 70, :y2 15, :x3 10, :y3 15, :x4 20, :y4 55}]