when some guys post something in the end or in the middle say spoiler alert and next to you click show and you can see tests result,victory road adopts etc

how can i add in my posts these?

You need to hit the button that says 'Go Advanced' and you should find it easily enough.

Other than clicking 'Go Advanced,' you can just type in [ SPOILER ] and [ /SPOILER ] without the spaces. Another cool feature is if you type in SPOILER= in the brackets, any words that follow the = will be in the top bar of the Spoiler Alert.. Here's an example

That was easy enough, wasn't it?

cool now I don't need to click go advanced to write a spoiler