A Couple Fairly Noobish Questions

I have a few questions that are probs a little noobish:
1- how do I use dark theme?'
2- how do I use spoilers?'

 

Click this for Dark Theme <3

 

Spoiler: Dark Theme

Spoiler: Spoiler

 

Thanks everyone! I now know evvverything!

 

Not everything, let us start here. In the beginning, God created the Earth and the Heavens-

 

If you want to do the spoilers manually, do

Code:

[spoiler] text here [/spoiler]

.

 

I figured that out, thanks!