diff --git a/run.sh b/run.sh
index 61655e5..232129b 100755
--- a/run.sh
+++ b/run.sh
@@ -1,42 +1,38 @@
 #!/bin/bash
 
-#
+############################################################################
 #   You can also pass some arguments to script to set some these options:
+#   
 #       --config: change the user and password to grafana and specify the mikrotik IP address
 #        stop: stop docker containers
+#   
 #   For example:
 #       sh run.sh --config
-#        
-#
-#
+#   
+############################################################################
 
 set -e
 
 REPO=Grafana-Mikrotik
 ENV_FILE=${ENV_FILE:-.env}
-IP=$(grep -R 'MIKROTIK_IP' ./.env | cut -d= -f2)
 
 #? Colors
-RED=$(printf '\033[31m')
-GREEN=$(printf '\033[32m')
-YELLOW=$(printf '\033[33m')
-BLUE=$(printf '\033[34m')
-BOLD=$(printf '\033[1m')
-RESET=$(printf '\033[m') #? No Color
+RED='\033[31m'
+GREEN='\033[32m'
+YELLOW='\033[33m'
+BLUE='\033[34m'
+BOLD='\033[1m'
+RESET='\033[m' #? No Color
 
-BOLD=$(printf '\033[1m')
-
-#? Docker
-DCUID=$(id -u)
-DCGID=$(id -g)
+BOLD='\033[1m'
 
 ask() {
     local prompt default reply
 
-    if [[ ${2:-} = 'Y' ]]; then
+    if [[ ${2} = 'Y' ]]; then
         prompt='Y/n'
         default='Y'
-    elif [[ ${2:-} = 'N' ]]; then
+    elif [[ ${2} = 'N' ]]; then
         prompt='y/N'
         default='N'
     else
@@ -47,88 +43,77 @@ ask() {
     while true; do
 
         #? Ask the question (not using "read -p" as it uses stderr not stdout)
-        echo -n "$1 [$prompt] "
+        echo -n "$1 [${prompt}] "
 
         #? Read the answer (use /dev/tty in case stdin is redirected from somewhere else)
         read -r reply </dev/tty
 
         #? Default?
-        if [[ -z $reply ]]; then
-            reply=$default
+        if [[ -z ${reply} ]]; then
+            reply=${default}
         fi
 
         #? Check if the reply is valid
-        case "$reply" in
-            Y*|y*) return 0 ;;
-            N*|n*) return 1 ;;
+        case "${reply}" in
+        Y* | y*) return 0 ;;
+        N* | n*) return 1 ;;
         esac
     done
 }
 
 command_exists() {
-  command -v "$@" >/dev/null 2>&1
+    command -v "$@" || {
+        fmt_error "$* is not installed. Please install $* first."
+        exit 1
+    } 
 }
 
 fmt_error() {
-  printf '%sError: %s%s\n' "$BOLD$RED" "$*" "$RESET" >&2
+    echo -e "\n${BOLD}${RED}Error: $*${RESET}\n" >&2
 }
 
-helper() {
-    if [ "$HELP" = yes ]; then
-        cat <<EOF
-
-You can also pass some arguments to script to set some these options:
-    --config: change the user and password to grafana and specify the mikrotik IP address
-    stop: stop docker containers
-
-For example:
-    sh run.sh --config
-
-EOF
+help() {
+    if [ "${HELP}" = yes ]; then
+        sed -n -e 's/^#   //' -e '3,12p;' "$0"
         exit 1
-    return
+        return
     fi
 }
 
 clone_git() {
 
-  echo "${BLUE}Git cloning ${REPO}...${RESET}"
+    echo -e "${BLUE}Git cloning ${REPO}...${RESET}"
+    git clone --depth=1 https://github.com/IgorKha/${REPO}.git ||
+        {
+            fmt_error "git clone of ${REPO} repo failed"
+            exit 1
+        }
 
-  command_exists git || {
-    fmt_error "git is not installed"
-    exit 1
-  }
-
-  git clone --depth=1 https://github.com/IgorKha/$REPO.git \
-    || {
-    fmt_error "git clone of ${REPO} repo failed"
-    exit 1
-  }
-
-  echo
+    echo
 }
 
 router_ip() {
-    if [ "$CONFIG" = yes ]; then
+    if [[ "${CONFIG}" = yes ]]; then
+        IP=$(grep -R 'MIKROTIK_IP' "${ENV_FILE}" 2>&1 | cut -d= -f2)
         echo -e "\n${BLUE}===================================="
         echo -e "\n${BOLD}Prometheus${RESET}\n"
         if ask "Change target mikrotik IP address ? (current ${IP})" Y; then
             read -rp 'Enter target mikrotik IP address: ' IP
             if [ -d "./${REPO}" ]; then
                 sed -ri -e '/mikrotik_ip/s/(- ).*( #.*)/\1'"${IP}"'\2/g' \
-                ${REPO}/prometheus/prometheus.yml
-                sed -ri -e 's/^(MIKROTIK_IP=)(.*)$/\1'"$IP"'/g' "$ENV_FILE"
+                    ${REPO}/prometheus/prometheus.yml
+                sed -ri -e 's/^(MIKROTIK_IP=)(.*)$/\1'"$IP"'/g' "${ENV_FILE}"
                 echo -e "\n${GREEN}... Prometheus target IP changed to ${IP}"
             else
                 sed -ri -e '/mikrotik_ip/s/(- ).*( #.*)/\1'"${IP}"'\2/g' \
-                ./prometheus/prometheus.yml
-                sed -ri -e 's/^(MIKROTIK_IP=)(.*)$/\1'"$IP"'/g' "$ENV_FILE"
+                    ./prometheus/prometheus.yml
+                sed -ri -e 's/^(MIKROTIK_IP=)(.*)$/\1'"${IP}"'/g' "${ENV_FILE}"
                 echo -e "\n${GREEN}... Prometheus target IP changed to ${IP}"
             fi
-        return
+            return
         fi
         echo -e "\n${BLUE}...Skipped step"
-    return
+        return
     fi
 }
 
@@ -153,17 +138,17 @@ router_ip() {
 # }
 
 grafana_credentials() {
-    if [ "$CONFIG" = yes ]; then
+    if [[ "${CONFIG}" = yes ]]; then
         echo -e "\n${YELLOW}===================================="
         echo -e "\n${BOLD}Grafana${RESET}\n"
         if ask "Change default credentials Grafana ?" N; then
             read -rp 'Enter grafana Username: ' GF_USER
             read -rsp 'Enter grafana Password: ' GF_PASSWD
 
-            sed -ri -e 's/^(GF_ADMIN_USER=)(.*)$/\1'"$GF_USER"'/g' "$ENV_FILE"
-            sed -ri -e 's/^(GF_ADMIN_PASSWORD=)(.*)$/\1'"$GF_PASSWD"'/g' "$ENV_FILE"
+            sed -ri -e 's/^(GF_ADMIN_USER=)(.*)$/\1'"${GF_USER}"'/g' "${ENV_FILE}"
+            sed -ri -e 's/^(GF_ADMIN_PASSWORD=)(.*)$/\1'"${GF_PASSWD}"'/g' "${ENV_FILE}"
         else
-            echo "Default Grafana:
+            echo -e "Default Grafana:
             User: ${YELLOW}admin${RESET}
             Password: ${YELLOW}mikrotik${RESET}"
         fi
@@ -172,68 +157,62 @@ grafana_credentials() {
 }
 
 docker() {
-    if ! command_exists docker-compose; then
-        echo "${YELLOW}docker-compose is not installed.${RESET} Please install docker-compose first."
-        echo "https://docs.docker.com/compose/install/"
-        exit 1
-    else
-         if [ "$STOP" = yes ]; then
-            if [ -d "./${REPO}" ]; then
-                cd ${REPO} && docker-compose down
-            else
-                docker-compose down
-            fi
+    if [[ "${STOP}" = yes ]]; then
+        if [ -d "./${REPO}" ]; then
+            cd ${REPO} && docker-compose down
         else
-            if [ -d "./${REPO}" ]; then
-                cd ${REPO} && docker-compose up -d
-                print_success
-            else
-                docker-compose up -d
-                print_success
-            fi
+            docker-compose down
+        fi
+    else
+        if [[ -d "./${REPO}" ]]; then
+            cd ${REPO} && docker-compose up -d
+            print_success
+        else
+            docker-compose up -d
+            print_success
         fi
     fi
 }
 
 print_success() {
     echo "============================================="
-    echo "${GREEN}Grafana http://localhost:3000"
-    echo "Prometheus http://localhost:9090/targets${RESET}"
+    echo -e "${GREEN}Grafana http://localhost:3000"
+    echo -e "Prometheus http://localhost:9090/targets${RESET}"
 }
 
 main() {
-    #? init
-    if [ -d "./${REPO}" ]; then
-        ENV_FILE=${REPO}/.env
-    else
-        if [[ -e $ENV_FILE ]]; then
-            :
-        else
-            clone_git
-            ENV_FILE=${REPO}/.env
-        fi
-    fi
 
     #? Parse arguments
-    while [ $# -gt 0 ]; do
+    while [[ $# -gt 0 ]]; do
         case $1 in
-        --help) HELP=yes;;
+        --help) HELP=yes ;;
         --config) CONFIG=yes ;;
         stop) STOP=yes ;;
         esac
         shift
     done
 
-    helper
+    help
+
+    command_exists git
+    command_exists docker-compose
+
+    #? init
+    if [[ -d "./${REPO}" ]]; then
+        ENV_FILE=${REPO}/.env
+    elif [[ ! -e ${ENV_FILE} ]]; then
+        clone_git
+        ENV_FILE=${REPO}/.env ;
+    fi
+
     router_ip
     # snmp_on
     grafana_credentials
 
     # Change UID:GID prometheus container to current user
-    sed -ri -e 's/^(CURRENT_USER=)(.*)$/\1'"$DCUID\:$DCGID"'/g' "$ENV_FILE"
+    sed -ri -e 's/^(CURRENT_USER=)(.*)$/\1'"$(id -u)\:$(id -g)"'/g' "${ENV_FILE}"
 
     docker
-
 }
 
 main "$@"