Godot Shader Tutorial [Basics] in 7 minutes

Hello children, let me introduce you to the magic world of shaders in Godot. But you all know I'm dumb so here are my references in this tutorial so you can hear it from the experts:
flash shader - https://youtu.be/dqilJirAAT0
full screen shader - https://youtu.be/x6dOxJa3zXY

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0:00 Introduction
1:10 The Basics
5:02 Practical Application
6:49 About Our Game