10  years = 0

20  money = 10000   

30  start = money

40  interest = 8.5/100

50  while money <= 2 * start

60     LPRINT years, money

70     years = years + 1

80     money = money + (interest * money)

90   wend

100  LPRINT "In "; years ; " years, you'll have $"; money

110  END