Twin parallelograms

This is done from a 3x4 setup occupied as if for the Offset C/L/W concept. However, those 1x4's are instead treated as distorted (diagonal) 2x2 boxes.

\sxvBBBs{b2n,g1n,b3n,g4n,.+.,.+.} \sxvBBBs{g1w,b1e,g4w,b4e,.+.,.+.}
2 4 1 3 3 1 4 2 + + + + 1 3 1 3 4 2 4 2 + + + +
before Twin Parallelograms Shakedown after