From the Fu Hsi arrangement we can easily plot the corners of a cube with trigrams. [Three breaks] and [Three bars], being most polar to each other, are mapped on opposite corners of a cube. The remaining six trigrams are mapped as orders of magnitude away from each pole. From [Three bars] we swap in a [break] at high, medium, and low - the same is done with [Three breaks], swapping in a [bar] at each position.