Linux Bash novice, I need a script to use the tab escape character and bel to format output from 10-1 [closed]

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How do I get bash script to output the following?

Output using \t
=================
Counter = 10
Counter = 9
Counter = 8
Counter = 7
Counter = 6
Counter = 5
Counter = 4
Counter = 3
Counter = 2
Counter = 1
Bell indicating end of script

I know how to do this script for increment like below:

#!/bin/bash
# simple escape character

clear
# output using tab
echo
echo Output using \\t
echo =================
counter=1
while [ $counter -le 10 ]
do
    echo -e "\tCounter \t= \t$counter
    ((counter++))
done
echo
echo -e "\aBell indicating end of script"
echo

I cannot find any text in books or online to show how to decrement. With this script it prints out values from 1-10 incrementing. I thought it was just using -- where the ++ is? Can anyone please explain this to me? I appreciate your help for a complete novice!

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I just used this script below

#!/bin/bash
# simple escape character

clear
# output using tab
echo
echo Output using \\t
echo =================
counter=10
while [ $counter -ge 1 ]
do
    echo -e "Counter \t= \t$counter"
    ((counter++))
done
echo
echo -e "\aBell indicating end of script"
echo

to get the following output,

Output using \t
=================
Counter     =   10
Counter     =   9
Counter     =   8
Counter     =   7
Counter     =   6
Counter     =   5
Counter     =   4
Counter     =   3
Counter     =   2
Counter     =   1

Bell indicating end of script