#G1---------------------------------------------- beziersurf bs 4 4 0 0 0 4 0 0 8 0 0 12 0 0 \ 0 4 0 4 4 1 8 4 0 12 4 0 \ 0 8 0 4 8 0 8 8 -1 12 8 0 \ 0 12 0 4 12 0 8 12 0 12 12 0 mkface bs bs prism p bs 0 0 5 box bx 3 3 2 6 6 10 bfuse f p bx nexplode f f depouille result f 0 0 1 f_4 5 0 0 12 0 0 1 \ f_10 5 0 0 12 0 0 1 set square 697.476