99 0 -1 loop-count GT 1 loop-count; bottles of beer on the wall.
loop-count; bottles of beer.
Take one down and pass it around.
((loop-count)-1); bottles of beer on the wall.

loop-count EQ 1 1; bottle of beer on the wall.
1; bottle of beer.
Take it down and pass it around.
No more bottles of beer on the wall.

loop-count LT 1 No more bottles of beer on the wall.
No more bottles of beer.
Go to the store and buy some more.
99 bottles of beer on the wall.