How to use Spoiler tags.
 

This is how you do a spoiler [spoiler="any title here"] Images, Text or whatever here [/SPOILE] (NOTE: There is an “R” in the last tag the “[/SPOILE], so remember to add that, the only reason I’m not adding the “R” is so I can show you how the tags are supposed to be written, if I added the “R” it would just show how the spoiler looks like when it’s done.)

Re: How to use Spoiler tags.
 

To make it more simple.

The above code would look like this if applied.