Flash an AVR/Arduino from a backup

flash.sh

#!/bin/bash
while [ true ] ; do
avrdude -V -p m32u4 -c usbtiny -U flash:w:backup_flash.bin
# avrdude -p m32u4 -c usbtiny -U eeprom:w:backup_eeprom.bin
avrdude -p m32u4 -c usbtiny -U hfuse:w:backup_hfuse.bin
avrdude -p m32u4 -c usbtiny -U lfuse:w:backup_lfuse.bin
avrdude -p m32u4 -c usbtiny -U efuse:w:backup_efuse.bin
say "flashing complete"
echo "Press any key to continue"
while [ true ] ; do
read -t 3 -n 1
if [ $? = 0 ] ; then
break
fi
done
done