Two different notations are supported. For an explanation of them, see:
 - http://en.wikipedia.org/wiki/Langton%27s_ant
 - http://en.wikipedia.org/wiki/Turmite

Examples turmites taken from the above articles:

RL
RLR
LLRR
LRRRRRLLR
LLRRRLRLRLLR
RRLLLRLLLRRR
R 1 0 , R 1 1 ; N 0 0 , N 0 1
N 1 1 , L 1 0 ; R 1 1 , N 0 0
R 1 1 , R 0 1 ; N 1 0 , N 1 1
R 1 1 , L 1 1 ; R 1 1 , R 0 0
L 1 0 , R 1 1 ; R 0 0 , L 0 1
L 1 1 , L 1 1 ; R 1 1 , N 0 0


Some interesting ones I've stumbled upon:

Chaotic growth with no obvious pattern:
RLLL
LRLL

Highway after 200K+ ticks:
LLRL

Variations of Langton's Ant:
RL
RUL
RUUL
etc.
They all seem to produce an essentially identical pattern. The second one takes
2.6M+ ticks to get to the highway.

Logarithmic growth:
RN
RRN
RRRN
etc.