My screen is blue so i cannot rotate the camera can sombody please help me 
That’s a little vague, but I’m guessing your screen is blue because you haven’t modified the camera fill mode and there are no visible objects in your scene. (Note that if there’s no visual frame of reference, you won’t be able to tell whether your camera is rotating or not based on what’s displayed in the game view.)
So I’d say, try adding some visible objects to the scene and see if that changes anything.
Can you be a bit more specifick im a bit new
Go to the GameObject menu, add some boxes, spheres, etc., place them at various locations in your scene, then enter play mode and see if you can see them and if you can move the camera around.
If you’re not sure how to do stuff like create game objects and so forth, then it’s time to hit the documentation and tutorials
I also have another uestion why are al my speheres and stuff see trough?
If you’ve simply started with the default scene and added some objects without making any other alterations, I’d be very surprised if your objects were see-through.
Perhaps you could post a screenshot to show us what you’re seeing exactly.
i started with them just like grey i don know what i pressed to make them see trough
So are you saying they are see-through? Or they aren’t?
If they are, you might just try starting over with a new scene. (Typically objects are ‘see-through’ when you’ve assigned a material to them that has translucent properties…)
They are see trouhg im jusst looking for a button to make them not see trough
I don’t know - maybe you accidentally changed the render mode for the scene view somehow (e.g. using one of the drop-down menus).
Again, I’d try creating a new scene (or maybe a new project). If that doesn’t work, post a screenshot showing your editor setup and the see-through effect that you’re describing.
thx its good now