Unity 2D - static camera, static background

How to create a very basic and static 2D scene with unity ?
Almost everywhere in the web, all tutorials talk about simple examples with parallax backgrounds, multilevel games, etc.
I want to know how can we create:

  • A very basic square scene with
  • for example, one sprite as background and
  • one camera covering only the square background and nothing else.

PS: All my attempts finished with the camera showing the square but with blue field around it.

PS: The camera does not need to follow anything, in fact all animations or interactions tend to be in the only one square field in the scene.

PS: I am a newcomer to the Unity world.

blue area is unavoidable, if you play a square game on a rectangular screen, what should it show for the remaining areas? You can put some black background behind, so that would give you your square, and some black areas instead of blue.

you can try to set camera.aspect to 1. You can do this with a script attached to the camera. However, if you play this on a rectangular screen, the game will be stretched, and will look ugly.

You may want to check scripting reference for these.