/* You learn at this example

- the use of a "for" loop on the right-hand side of a rule
- the automatic generation of several lateral branches

*/

protected void init()
[ Axiom ==> F(10); ]

public void lateralBranch()
[
// for each F, its length x is taken as the turtle's
// step length ( L(x) )
   f:F(x) ==> f L(x)

// Counting loop (for) with 5 runs.
// Each run generates a daughter branch.
// The variable i is an integer which is incremented by 1
// in each run (1, 2, ..., 5).
		
for (int i=1; i<=5; i++) 
   (
// MRel(0.1*i+0.2) specifies the position at the mother shoot,
// starting at 20%, + 10% per run.
   [ MRel(0.1*i+0.2) RU((-1**i)*30) F(x*0.2) ]
// RU((-1**i)*30) lets the branching angle flip between
// -30 and 30 degrees.
   );
]