Exit draw if dir not provided

draw.sh

@@ -1,6 +1,9 @@
 #!/bin/bash
 
-#field guide
+if [[ "${1}" == "" ]]; then
+	echo "Please provide a directory as the first argument"
+	exit 1
+fi
 
 if [ "${2}" == "" ]; then
 	name=`basename "${1}"`