#!/bin/bash
# bash while loop

# number to start with to call the original files (usually not changed)
COUNT=1

# number to start with to name the new files (usually not changed)
COUNT2=1

# total number of original files
OTOTAL=250

# total number of end files
ETOTAL=1000

# loop to call up the files to process. repeatedly calls up files numbered from 001 to $OTOTAL in accending order

while [ $COUNT -le $OTOTAL ]; do

if [ $COUNT -lt $OTOTAL ]; then
    VAR=`printf "%03d" $COUNT`

elif [ $COUNT -eq $OTOTAL ]; then
    COUNT=0
    VAR=$OTOTAL

fi

let COUNT=COUNT+1

#Limits the number of times files are called up to the variable $etotal. names the output files up to 9999

if [ $COUNT2 -le $ETOTAL ]; then
    VAR2=`printf "%04d" $COUNT2`

elif [ $COUNT2 -gt $ETOTAL ]; then
break

fi

let COUNT2=COUNT2+1

echo $VAR

done