#set x_b = 99;
#while (x_b > 0)
{
   #pause 2;
   say $x_b$ bottles of beer on the wall.  $x_b$ bottles of beer...;
   say take one down and pass it around.;
   #set x_b = (x_b - 1);
   say $x_b$ bottles of beer on the wall.;
}
;