</$objtype/mkfile OBJS = main.$O bbox.$O sphere.$O scene.$O plane.$O trace.$O light.$O colour.$OHDRS = scene.h %.$O: %.c	$CC $stem.c %.$O: $HDRS $O.yar: $OBJS	$LD -o $O.yar $OBJS show:V: what.png what.png: $O.yar	$O.yar | topng > what.png clean:V:	rm *.$O $O.*