TurtleAction:
| "draw"
| "move"
| "yaw-left"
| "yaw-right"
| "pitch-up"
| "pitch-down"
| "roll-left"
| "roll-right"
| "turn-around"
| "push"
| "pop"
| "set-width"
| "decrease-width"
| "polygon-begin"
| "polygon-vertex"
| "polygon-end"
| "align-vertical"
Supported built-in turtle actions.