||The arrays of x and y values defining the
vertices of dimension nsides + 1 to allow the panel to be closed.
The units are inches (cm).
||Number of sides of the figure (same as the number of vertices).
||The color or pattern of the panel fill lines. A number from -15
to 0 indicates a solid color. The numbers are the negative of the IBM color
numbers. Geometric patterns may be selected by choosing a number between
1 and 16. Dithered colored patterns may be selected by choosing a number
from 50 to 174, and RGB colors may be selected from the range 200 to 447.
||= 0 No border will be drawn around the panel.
= 1 A border will be drawn around the panel.