Hide and Show an element by clicking the same button?

Hide and Show an element by clicking the same button?

Hi,

Please take a look at my code here:

http://codepen.io/itsthomas/pen/vEKezr

I want that when I click the button the text below it disappears and at the next click appears again.
It works but just from the second click. The first click on the button doese nothing.

Why ? What is wrong with my code ?

Thank You