не работает скрипт как нужно

while : 
	do 
	curl -s -o /dev/null -I -w "response_code: %{http_code}\n" $1


		if [ "$responce_code" == 301 ]; then
			:
			printf "1 - Warning\n"
		elif [ "$responce_code" == 200 ]; then
			:
			printf "0 - Ok\n"
		elif [ "$responce_code" == 401 ]; then
			:
			printf "2 - Critical\n"
		else 
			printf "No responce\n"
		fi
	done