now you can put 5 dollars in your bank account and constantly withdraw 1 dollar for eternity without ever running out of money,(reply>), It doesn't add 1 to 4, it replaces the 132nd element's value with the value of 133rd element. Meaning that if you count down from, say, 7, you'd get 7, 6, 5, 5, 3, 2, 1.