How do i use shell scripting services to start and stop a shell script?

I'm using CentOS 7 what my aim is to create a cron for every five seconds but as I researched we can use cron only for a minute so what I am doing now is I have created a shell file.
hit.sh

while sleep 5; do curl http://localhost/test.php; done

but I have hit it manually through right clicking it.

What i want to do is create a service for this file so i can start and stop it automatically

I found the script to create a service

#!/bin/bash
# chkconfig: 2345 20 80
# description: Description comes here....

# Source function library.
. /etc/init.d/functions

start() {
    # code to start app comes here
    # example: daemon program_name &
}

stop() {
    # code to stop app comes here
    # example: killproc program_name
}

case "$1" in
    start)
       start
       ;;
    stop)
       stop
       ;;
    restart)
       stop
       start
       ;;
    status)
       # code to check status of app comes here
       # example: status program_name
       ;;
    *)
       echo "Usage: $0 {start|stop|status|restart}"
esac

exit 0

But I don't know what to write in start or stop methods I tried placing the same content of hit.sh in start(){} but it gave error for } in stop method.

If you would like to reuse your code sample it could look like

#!/bin/bash

case "$1" in
start)
   /path/to/hit.sh &
   echo $!>/var/run/hit.pid
   ;;
stop)
   kill `cat /var/run/hit.pid`
   rm /var/run/hit.pid
   ;;
restart)
   $0 stop
   $0 start
   ;;
status)
   if [ -e /var/run/hit.pid ]; then
      echo hit.sh is running, pid=`cat /var/run/hit.pid`
   else
      echo hit.sh is NOT running
      exit 1
   fi
   ;;
*)
   echo "Usage: $0 {start|stop|status|restart}"
esac

exit 0

Naturally, the script you want to be executed as a service should go to e.g. /usr/local/bin/hit.sh , and the above code should go to /etc/init.d/hitservice .

For every runlevel which needs this service running you will need to create a symlink For example, a symlink named /etc/init.d/rc5.d/S99hitservice will start the service for runlevel 5. Of course, you can still start and stop it manually via service hitservice start / service hitservice stop