If you want to know how to make a spoiler, here are visuals to help you!
Step 1: Type in a message below that you want to make a spoiler.
Step 2: Once you typed out the message, highlight the message you want to create a spoiler for (the thing in blue will be what appears when you click the spoiler box)
Step 3: Once highlighted, click on the box thing (it's in red)
Step 4: Once you click on the box, this should appear
Step 5: If you want, you can type a spoiler title (e.g. Spoiler 1, Spoiler 2, etc)
Step 6: Once completed, it should look like this