monitoring alert log

 I need a script that runs as cron job every hour and notify me by email if there are any errors in the alert log from current day. If there are no errors, the email will be blank.

The scripts I have right now:

#!/bin/ksh
cd /dsk01/oradata/rtest/bdump
files="alert_*.log"
for file in $(find $files)
do
DT=$(date)
awk '
BEGIN {Flg=0}
NR==1  {R=split(DATE, TMP, " ")
       Day=TMP[1]
       Month=TMP[2]
       NoDay=TMP[3]}
{NoDayM=NoDay-1}
NF==5 && $2==Month && ( $3==(NoDayM) || $3==NoDay ) {Flg=1}
Flg==1  {print $0}
' DATE="$DT" $file | awk '
/^ORA-/ || /cannot/ {print DATE
print $0}
NF==5  {DATE=$0}
'
done
exit 0