[Yugong series] creation of 009 unity object of U3D full stack class in February 2022

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Preface

1、Create A scene PracticeOne;Delete Everything in the scene
2、Create A camera , Camera Tag It is amended as follows MainCamera
3、Create One 2D Sprite, to 2D Sprite assignment ;（2D Sripte Change the color ,2D Sprite Switch images ）
–Create A simple Sprite, Use Sprite to 2D Sprite Game object assignment
4、Create One 3D Cube, to Cube assignment ;（3D Cube Change the color ,3D Cube Switch images &