Syntax:
R::=SSSS
No spaces, only one operand on the left
All operands must be single-letter

Built-in symbols:
F: draw forward 1
[: push current location and direction on stack
]: pop stack, return turtle
+: turn right
-: turn left

Rules(one per line):

Output:

Turn by (degrees):

Start string:

Syntax: R::=SSSS No spaces, only one operand on the left All operands must be single-letter Built-in symbols: F: draw forward 1 [: push current location and direction on stack ]: pop stack, return turtle +: turn right -: turn left
Rules(one per line): A::=C[+B][-B] B::=FA C::=JJF J::=K K::=L L::=C	Output:
Turn by (degrees):
Start string: