restarting script when it crashes

restart.py

#!/bin/sh

COMMAND='python /home/runcloud/parser/live.py'
LOGFILE=restart.txt

writelog() {
    now=`date`
    echo "$now $*" >> $LOGFILE
}

writelog "Starting"
while true ; do
    $COMMAND
    writelog "Exited with status $?"
    writelog "Restarting"
done