// Number of terms of the Fibonacci sequence to print (minimum 2).
let n: int = 16;

let mutable t0: int = 0;   // First term in the Fibonacci sequence
let mutable t1: int = 1;   // Second term in the Fibonacci sequence

println(t0);
println(t1);

let mutable i: int = 2;    // Counter: how many terms we printed
let mutable next: int = 0; // Next term in the Fibonacci sequence

while (i < n) do {
    next <- t0 + t1;
    println(next);
    t0 <- t1;
    t1 <- next;
    i <- i + 1
}