Autospawn prop on server start

How to spawn prop to exactly location where I want and rotate exactly 90 degrees.

Using Lua.
[sp]Dodging straight answer because this is obviously a do-for-me or ‘I don’t know Lua’ thread[/sp]

If you do know lua then you have to create a table filled with positions, prop models and angles.
Using InitPostEntity loop throught whole table and create entity at the pos, rotate it to certain ang and set its model to certain model