[djslater107]

You are setting a bottles variable to the value of 100 - index
But you are not using that variable in the lyrics you are displaying and so, as near as I can tell you will be displaying

"bottles of pop on the wall"
"bottles of pop"
"bottles of pop on the wall"

without the actual number

you want to use join together world function

bottles + "bottles of pop on the wall"

Don Slater
Alice Project