How to write a linux script with loop

How to write a linux script with loop

While true

do

XXXX (Command1)

sleep 2 

XXXX (Command2)

done

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Add count with color

While true

do

XXXX (Command1)

sleep 2 

XXXX (Command2)

echo -e "\033[40;32m  "This is $count times." \033[0m"

count =$(($count+1))

done