We'll create fresh WordPress site with Simple Spoiler installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Use spoilers to hide some content on the page using shortcode. On the settings page, you can specify the color of the spoiler.
Example: [spoiler]Spoiler content[/spoiler]
Example: [spoiler title="Show spoiler"]Spoiler content[/spoiler]
You can translate Simple Spoiler on translate.wordpress.org.