Answer:
(d, left, right) ⇒ (d, di, -di)
Step-by-step explanation:
In the complex plane, successive left turns make this your sequence of facing directions: 1, i, -1, -i, 1. Effectively, your facing direction is multiplied by i.
Successive right turns make this your sequence of facing directions: 1, -i, -1, i, 1. Effectively, your facing direction is multiplied by -i.
Your table can be filled as follows:
(initial d, left turn, right turn)
(-1, -i, i)
(1, i, -i)
(i, -1, 1)
(-i, 1, -1)
(d, di, -di)
