1-
: 1c set | cast off ; turn 1&frac14; LH to centre line
9–12
: 2c+1W & 1M+3c RHA, 1c end BtoB, 1M/1W facing down/up
13–24
: Revolving Double Triangles: all set as DTr, on [14] 1c pull RSh back | 1c quickly pass P RSh to 2cnr place **while{2}** 2cnrs cast off/up on side **while{2}** 1cnrs petronella turn (skip change) to end BtoB in centre ;
  repeat [13–16] twice, 1c ending BtoB in centre, 1M/1W facing down/up
25-
: 1c cast RSh round 4cnr to 2pl ; all turn P RH (2,1,3)