Bash script to alert when the Apple Store comes back up

storeup.sh

#!/bin/bash
isup=0
check=0
store=au # change this to your country code
player=play
sound=/System/Library/Sounds/Tink.aiff

if [[ "$(which afplay)" != "" ]]; then
    player=afplay
fi

if [[ -f "/System/Library/Audio/UISounds/Tink.caf" ]]; then
    sound=/System/Library/Audio/UISounds/Tink.caf
fi

while [[ "$isup" != "1" ]]; do
    check=$((check + 1))
    (curl -I "http://store.apple.com/$store" | grep -E "^HTTP/1.1 503") > /dev/null 2>/dev/null
    if [[ $? != 0 ]]; then
        echo "$(date): STORE IS UP - checked $check times"
        isup=1
        "$player" "$sound"
        "$player" "$sound"
    else
        echo -n .
        sleep 90
    fi
done