made using blender. if you want a tutorial watch this: https://www.youtube.com/watch?v=ntCuQei0xuk (i used the boolean method, and instead of rotating just did a linear up and down motion.) also i made the torus knot have an emmissive texture and removed all light from the scene. if you want the background of the render to be transparent go to the camera icon, press the film dropdown, and check the box that says transparent
cool loading screen too. someday i hope that i can make this show as 3d, but right now it isn't doing that properly, it just looks like a white blob
