#!/bin/bash

count=0

while true; do
    if [ -t 0 ]; then stty -echo -icanon time 0 min 0; fi

    keypress=''
    while [ "x$keypress" = "x" ]; do
        #do something... in your case:
        d=`date +%H:%M`
        #echo $d
        a=$(awk '/Failed/{ print $1, $2, $3,$6,$11,$12,$13}'  /var/log/auth.log | awk "BEGIN {p=0}; /$d/")
         if [  ! -z "$a" ]; then
         count=$((++count));
         fi 
          if [ $count -eq 1 ]; then
          echo $a
          mail.sh "You have an intuder at richard@richard-Thinkcentre-M77" "$a"
          fi  
          #echo $count
           if [  -z "$a" ]; then
           count=0;
           fi 
         #end of do something

        read keypress
    done

    if [ -t 0 ]; then stty sane; fi 

    echo "You pressed '$keypress' for pause."
    read -p 'Press [Enter] key to continue or [Ctrl+C] to finish...'
done