Help with BossBar Addon

It’s my first time creating a yarn and my first time here for Modding support (haha my English is a little rusty),

ire directly to the point I need some help or someone teach me to make a script for an Addon BossBar and seen some tutorials, some mods that are similar to test, I managed to make it work but the name options didn’t work and I would feel something dirty stealing or copying code, I prefer to post a message on the support board for some help.