$(wildcard sounds/*.wav) \
$(wildcard images/*.png) \
$(wildcard images/*.xpm) \
$(wildcard images/background/*.png) \
$(wildcard images/background/*.jpg) \
$(wildcard sounds/*.wav) \
$(wildcard images/*.png) \
$(wildcard images/*.xpm) \
$(wildcard images/background/*.png) \
$(wildcard images/background/*.jpg) \