Here is a Sci-Fi door with animation.
Demo Video: https://www.youtube.com/watch?v=fY4aMcY3hQs
BLEND (Blender, filesize: 3.47 MB), OBJ (OBJ, filesize: 25.5 KB), FBX (Autodesk FBX, filesize: 378 KB), DAE (Collada, filesize: 329 KB), DXF (DXF, filesize: 43.8 KB), STL (Stereolithography, filesize: 13 KB), UNITYPACKAGE (Unity 3D, filesize: 879 KB)