Point the mouse within the screen to rotate your camera. Use WASD to move around. Optonal: use the dials on the screen to change the size, thickness, position, etc of the box.
Special thanks to these (4) YouTube tutorials by Scratch Tutorials: https://www.youtube.com/watch?v=461c0Xqe4FU&list=WL&index=5&t=332s https://www.youtube.com/watch?v=cM6slk2dYTs&index=3&list=WL https://www.youtube.com/watch?v=SOg346N_oJU&index=2&list=WL https://www.youtube.com/watch?v=VEBis3v_BoE&index=1&list=WL