load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"

begin
  wks = gsn_open_wks("ps","color4")    ; Open a PS file "color4.ps"

;
; Change the color map using a predefined color map. See:
;
;   http://www.ncl.ucar.edu/Document/Graphics/color_table_gallery.shtml
;
  gsn_define_colormap(wks,"ViBlGrWhYeOrRe") ; Set the ViBlGrWhYeOrRe color map
  gsn_draw_colormap(wks)                    ; Draw the color map.

end