New to Construct!
I also need to know how to make it wrap around the screen while its scrolling!
Develop games in your browser. Powerful, performant & highly capable.
Try one of these, one of them should meet your needs.
https://www.scirra.com/tutorials/905/to ... background
https://www.scirra.com/tutorials/309/cr ... s-textures
https://www.scirra.com/tutorials/712/cr ... -with-sine