A1: Ones R-hand turn (8 steps) and face up. Cast down while twos move up - use all 8 steps so you arrive just in time for the next move.
A2: Ones L-hand and face up. Cast down while threes move up - again use all 8 steps.
B1: Circle 6 L, 8 slips. Circle R.
B2: Ones lead up middle. Cast to 2nd place, and turn single down.
A3: Ones go right: two-hand turn first corner. Ones turn each other.
A4: Ones go left: two-hand turn half-way until ones see each other. Ones turn 1½ (or 2½) to own side.
B3: Ones go left: full figure eight through this couple, starting R shoulder.
B4: Ones change ends: full hey for three with the other couple, starting L shoulder, then ones meet and lead down to bottom place while threes finish the hey in 2nd place.
Repeat twice more.