diff --git a/gravity-sync.sh b/gravity-sync.sh
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+#!/bin/bash
+
+# Gravity Sync by vmstan
+
+# Must execute from a location in the home folder of the user who own's it (ex: /home/pi/gravity-sync)
+# Configure certificate based SSH authentication between the Pihole HA nodes - it does not use passwords
+# Tested against Pihole 5.0 GA on Raspbian Jesse and Ubuntu 20.04, but it should work on most configs
+# More installation instructions available at https://vmstan.com/gravity-sync
+
+# You must change the REMOTE_HOST and REMOTE_USER variables below to match your configuration
+
+# STANDARD SETTINGS
+REMOTE_HOST='192.168.7.5'
+REMOTE_USER='ubuntu'
+
+# PUSH SETTINGS
+
+
+# CUSTOMIZATION
+LOCAL_FOLDR='gravity-sync' # see above
+SYNCING_LOG='gravity-sync.log' # see above
+
+# PIHOLE DEFAULTS
+PIHOLE_DIR='/etc/pihole'  # default install directory
+GRAVITY_FI='gravity.db' # this should not change
+
+# SCRIPT COLORS
+RED='\033[91m'
+GREEN='\033[92m'
+CYAN='\033[96m'
+NC='\033[0m'
+
+VERSION='1.1'
+
+##############################################
+
+# print title
+# echo -e "${GREEN}Gravity Sync ${VERSION}${NC}"
+
+case $# in
+   0)
+	echo -e "You must define the direction you want to replicate ${GRAVITY_FI}"
+	echo "Usage: $0 {pull|push}"
+	echo -e "${RED}Pull${NC} will copy the primary blocklists ($REMOTE_HOST) to this server"
+	echo -e "${RED}Push${NC} will force any changes made on this server to the primary"
+      	exit 1
+	;;
+   1)
+      case $1 in
+	pull)
+
+	echo -e "${CYAN}Copying remote ${GRAVITY_FI} from ${REMOTE_HOST}${NC}"
+	rsync -v -e 'ssh -p 22' ${REMOTE_USER}@${REMOTE_HOST}:${PIHOLE_DIR}/${GRAVITY_FI} ~/${LOCAL_FOLDR}/${GRAVITY_FI}
+	echo -e "${CYAN}Replacing gravity.db on HA secondary${NC}"
+	sudo mv -v ${PIHOLE_DIR}/${GRAVITY_FI} ${PIHOLE_DIR}/${GRAVITY_FI}.backup
+	sudo cp -v ~/${LOCAL_FOLDR}/${GRAVITY_FI} ${PIHOLE_DIR}
+	sudo chmod 644 ${PIHOLE_DIR}/${GRAVITY_FI}
+	sudo chown pihole:pihole ${PIHOLE_DIR}/${GRAVITY_FI}
+	echo -e "${CYAN}Reloading configuration of HA secondary FTLDNS from new gravity.db${NC}"
+	pihole restartdns reloadlists
+	pihole restartdns
+	echo -e "${CYAN}Cleaning up things${NC}"
+	mv -v ~/${LOCAL_FOLDR}/${GRAVITY_FI} ~/${LOCAL_FOLDR}/${GRAVITY_FI}.last
+	date >> ~/${LOCAL_FOLDR}/${SYNCING_LOG}
+	echo -e "${GREEN}gravity.db pull completed${NC}"
+ 	;;
+
+	push)
+	echo -e "${RED}WARNING - DATA LOSS POSSIBLE${NC}"
+	echo -e "Are you sure you want to overwrite the primary node configuration on ${REMOTE_HOST}?"
+	select yn in "Yes" "No"; do
+	    case $yn in
+	        Yes )
+			echo "Replacing gravity.db on primary"
+			echo -e "${CYAN}Copying local ${GRAVITY_FI} to ${REMOTE_HOST}${NC}"
+			rsync --rsync-path="sudo rsync" -v -e 'ssh -p 22' ${PIHOLE_DIR}/${GRAVITY_FI} ${REMOTE_USER}@${REMOTE_HOST}:${PIHOLE_DIR}/${GRAVITY_FI}
+			echo -e "${CYAN}Applying permissions to remote gravity.db${NC}"
+			ssh ${REMOTE_USER}@${REMOTE_HOST} "sudo chmod 644 ${PIHOLE_DIR}/${GRAVITY_FI}"
+			ssh ${REMOTE_USER}@${REMOTE_HOST} "sudo chown pihole:pihole ${PIHOLE_DIR}/${GRAVITY_FI}"
+			echo -e "${CYAN}Reloading configuration on remote FTLDNS${NC}"
+			ssh ${REMOTE_USER}@${REMOTE_HOST} 'pihole restartdns reloadlists'
+			ssh ${REMOTE_USER}@${REMOTE_HOST} 'pihole restartdns'
+			echo -e "${GREEN}gravity.db push completed${NC}"
+			break;;
+	        No )
+			echo "No changes have been made"
+			exit;;
+	    esac
+	done
+	;;
+
+	*)
+	echo -e "${RED}'$1' is not a valid argument${NC}"
+        echo "Usage: $0 {pull|push}"
+        exit 2
+	;;
+      esac
+      ;;
+  *)
+      echo -e "${RED}Too many arguments provided ($#)${NC}"
+      echo "Usage: $0 {pull|push}"
+      exit 3
+      ;;
+esac
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