Set the orientation of a Prefab

So i have some Prefabs which will be my Level Parts. How to Spawn them in rotated ?
I am also spawning the same Prefab multiple times. So i want it one time in one direction one other time in another:

Here is a Example:

Thanks for you help.

Greetings

Teiwaz

The instantiate method allows you to specify a position as well as a rotation. Therefore, if you new the rotation and position you wanted, you could write:

Instantiate(prefab, position, rotation);

This allows you to make multiple objects each with their own rotation. More info can be found here: Unity - Scripting API: Object.Instantiate

instantiate(prefab,position,rotation)

change rotation to change its rotation.

you can just do a normal rotation plus or minus 90/180 degrees to do a simple rotation