Axiom:
[N]++[N]++[N]++[N]++[N]
Rules:
M=OA++pA—-NA[-OA----MA]++;
N=+OA–PA[---MA--NA]+;
O=-MA++NA[+++OA++PA]-;
P=–OA++++MA[+PA++++NA]–NA;
A=
Angle:36
This formula was entered into Inkscape/Effect/Render/L-System, and then coloured in manually as seen below.

