Tutorial: How to make invincibility frames in Godot Engine? (Godot 3.0.6) [CC] 

Hello everyone!
I added closed captions so you can understand me better. I'm not a native english speaker, so yeaaahhh, my pronunciation can be pretty bad sometimes.
This is my first tutorial ever made! Making tutorials is harder than I thought! But I hope it was good enough so it can help people who are trying to make invincibility frames work. Since sometimes, even with reading through the forums, I just can't do stuff, until I watch a video.
Music used:
Green Greens - Kirby Super Star OST
Spring Breeze/Float Islands - Kirby Super Star OST
Outro Music: "Super Mario World Game Over LoFi Hip Hop Remix" by Phillip "Hephestos" Schlosser
/ hephestosmusic