assign n = 5
while n >= 1 do
   if n == 1 then
     display 1
   else if n == 2 then
     display 2
   else if n == 3 then
     display 3
   else if n == 4 then
     display 4
   else if n == 5 then
     display 5
   else
     display 'Unknown'
   end end end end end
   assign n = n - 1
end
display 'Blast off!'