bitcoin balance checker from bash

bitchecker.sh

echo "|||**** BITBALANCE ****|||"
echo "||| Wallet to check: "
read bitwallet
echo "You entered: $bitwallet"
curl --silent "https://blockchain.info/address/$bitwallet?format=json" > balance.txt &
pid=$!

spin[0]="-"
spin[1]="\\"
spin[2]="|"
spin[3]="/"

echo "[processing wallet balance] ${spin[0]}"
i=1
sp="/-\|"
echo ' '
while ps -p $pid > /dev/null;
do
    printf "\b${sp:i++%${#sp}:1}"
done
clear
bitbalance=$(cat balance.txt | grep "balance" | sed 's/,$//' | sed 's/.*://')
bitbalancefix=$(bc -l <<< "$bitbalance/100000000")
printf "Balance for Wallet $bitwallet is:"
printf "%.6f", "$bitbalancefix"

added a nice spinner in there to whistle while you work