Add example with Fibonacci sequence
/*
 * Copyright (c) 2017, Lee Keitel
 * This file is released under the BSD 3-Clause license.
 *
 * This file demonstrates recursion using the Fibonacci sequence.
 */

func fib(x) {
     if (x == 0) {
        return 0;
     }

     if (x == 1) {
        return 1;
     }

     return fib(x-1) + fib(x-2);
}

println(fib(10));