This has the effect making x approach 0 as we continue to pick new values of x under this rule. Wherever we start with the first x, the next one is closer to 0 and so is every subsequent value. On the this display we demonstrate that effect. Repeat the process as often as you like, all you can do is get closer and closer to 0 with the value of x. It is as though x=0 was trapping our graph, drawing it toward that point.