I am new to Shell Scripting and I need help to write the following script in a different format...

This is the current script:

#!/usr/bin/ksh
environment=rms
export environment
. $AW_HOME/RETEK/exec/RETEK_ENVAR
ls -ltr $MMPOS/RTLOG* | tr -s " " | cut -d " " -f9 >$MMHOME/oracle/proc/bin/rtlogfiles.txt
touch $MMHOME/oracle/proc/bin/prom.1
while read LINE
do
 saimptlogi_running=1
 . $MMHOME/awbatch/refreshsql.sh saimptlogi
 echo $LINE 
 mv $LINE $LINE.1
 Date=`date "+%m%d%y%n"`
 awrun -m saimptlogi -args 1 Y $LINE.1 $MMHOME/oracle/proc/bin/bad.1 $MMHOME/oracle/proc/bin/item.1 $MMHOME/oracle/proc/bin/waste.1    $MMHOME/oracle/proc/bin/ref_item.1 $MMHOME/oracle/proc/bin/prim_variant.1 $MMHOME/oracle/proc/bin/varupc.1 $MMHOME/oracle/proc/bin/storeday.1 $MMHOME/oracle/proc/bin/prom.1 $MMHOME/oracle/proc/bin/codes.1 $MMHOME/oracle/proc/bin/error.1 $MMHOME/oracle/proc/bin/ccval.1 $MMHOME/oracle/proc/bin/storepos.1 $MMHOME/oracle/proc/bin/tendertype.1 $MMHOME/oracle/proc/bin/merchcodes.1 $MMHOME/oracle/proc/bin/partner.1 $MMHOME/oracle/proc/bin/supplier.1 $MMHOME/oracle/proc/bin/employee.1 $MMHOME/oracle/proc/bin/banner.1 $MMHOME/oracle/proc/bin/ref_mmrp.1 $MMHOME/oracle/proc/bin/igtax.1 " " Y
 sleep 140
done <$MMHOME/oracle/proc/bin/rtlogfiles.txt
sleep 90
while true 
do
    saimptlogi_running=`awexe jq |grep saimptlogi | grep -v REJ | wc -l`
    if [ $saimptlogi_running = 0 ]; then
       mv ls -ltr $MMPOS/RTLOG*.1 $MMHOME/arch
       break
    fi   
done;