A short "work in progress" exploring the 10-cell, a regular tessellation of the 3-dimensional sphere. It begins by showing how six of the 10 fundamental regions can be generated by a screw motion around one line (which appears as a fixed circle with a 3-color stripe). This motion is repeated with a boundary framework, and then using full size for the fundamental regions. Then we fly along the polar line (which goes perpendicular into the screen). Without narration, but with special musical score composed by Luis Vera.