/* graph's argument is either height or height,width */
if (args) {
if (sscanf(args, "%d,%d %x %x %i", h, w, first_colour, last_colour,
/* graph's argument is either height or height,width */
if (args) {
if (sscanf(args, "%d,%d %x %x %i", h, w, first_colour, last_colour,