hello|
define fib<1> as [
    return 1 if argument #1 = 1|
    return 1 if argument #1 = 2|
    return do "fib"<argument #1-1;> + do "fib"<argument #1-2;>|
]|
do print<do "fib"<1;>;>|
do print<do "fib"<2;>;>|
do print<do "fib"<3;>;>|
do print<do "fib"<6;>;>|
do print<do "fib"<10;>;>|
goodbye|