// fig 3.5, page 74

capsella_bursalis(n)	=> attr (delta,18) attr (width, 1.8) attr (color, '0 1 0) I(9) a(13), n;

a(0)		=> [&(70)L]/(137.5)I(10)A;
a(t)		=> [&(70)L]/(137.5)I(10)a(t-1);
A		=> [&(18)u(4)FFI(10)I(5)X(5)KKKK]/(137.5)I(8)A;
I(0)		=> F;
I(t)		=> FI(t-1);
u(0)		=> &(9);
u(t)		=> &(9)u(t-1);
L		=> [attr(color, '0.4 1 0)
		    [{.-FI(7)&(10)+FI(7) attr(color,'1 1 0.2) +FI(7)}]
		    [{.+FI(7)&(10)-FI(7) attr(color,'1 1 0.2) -FI(7)}]
		   ];
K		=> [attr(color, '0.9 0.2 0)
		    [&{.+FI(2)--FI(2)}]
		    [&{.-FI(2)++FI(2)}]/(90)
		   ];
X(0)		=> ^(50)[[-GGGG++[GGG[++G{.].].].++GGGG.--GGG.--G.}]%;