Creation
To create a bar just use the command /bbt and a menu will popup. Since our goal to create a new bar we are going to click the first option (the first book), like shown in the image:
Now when we click the item you'll notice that the menu closes and a title shows up saying that we need to enter a name. This name is the key name of the bar, which means that you'll use that name later to start, stop, edit and remove the bar timer. I will enter tutorial_bar as a bar key name.
Note: if you want to cancel the process you'll notice, if you read the chat, that you can type cancel to cancel the bar creation.
After you completed the second step you'll notice that a new menu has been opened. Now you have a few options to choose from, so you can edit your bar as you like. The new menu should look like this:
Note: Don't be afraid to accidentally close the menu, because if you do you can reopen it with /bbt, this could be useful if you want to see better in how the bar is looking.