This isn't for discussing orientational problems for tetronian writing, but, rather, designing an alphanumeric system. All I could think of for letters were 3 lines crossing at right angles, and a circle with a perpindicualar line through it's center.
For numerals, Imagine a wireframe cube with the opposite verticies connected. Each edge represents a binary digit. the segments connecting the vertexes are just to relieve ambiguity. If the digit is 1, the segment is filled in. If it's 0, it isn't. The digits spiral downwards in a clockwise direction. The connecter segments are always there.
This would allow you to reach Base-4,096.
Therefore, only the connectors would be 0, and the all edges and all the connecters would be 4,095.