SETPENCOLOR colornumber.or.rgblist
SETPC colornumber.or.rgblist

	sets the pen color to the given number, which must be a nonnegative
	integer.  There are initial assignments for the first 16 colors:

	 0  black	 1  blue	 2  green	 3  cyan
	 4  red		 5  magenta	 6  yellow	 7 white
	 8  brown	 9  tan		10  forest	11  aqua
	12  salmon	13  purple	14  orange	15  grey

	but other colors can be assigned to numbers by the PALETTE command.
	Alternatively, sets the pen color to the given RGB values (a list of
	three nonnegative integers less than 64K (65536) specifying the amount
	of red, green, and blue in the desired color).