NAME:
	mapseq
 PURPOSE: (one line)
	Animate a seqence of PLUTOMEM maps.
 DESCRIPTION:
 CATEGORY:
       Miscellaneous
 CALLING SEQUENCE:
	mapseq,root,frame1,frame2,scale,step=step
 INPUTS:
	root   - String containing a four character root for the map file name.
	frame1 - Starting frame number to animate.
	frame2 - Ending frame number to animate.
	scale  - Zoom factor for the image.
 OPTIONAL INPUT PARAMETERS:
 KEYWORD PARAMETERS:
	step   - Step size between frames to be displayed (default = 1).
 OUTPUTS:
	Visual output only.
 COMMON BLOCKS:
 SIDE EFFECTS:
 RESTRICTIONS:
	The number of frames to animate (frame2-frame1)/step must be less than
	256.  This is a limitation imposed by Xinteranimate as of Jan. 1992.
 PROCEDURE:
 MODIFICATION HISTORY:
	Written 1992 Jan. by Marc W. Buie, Lowell Observatory.