void main() {
    IO.println("Countdown:");
    for (int i = 5; i > 0; i--) {
        IO.println(i);
    }
    IO.println("Liftoff.");
}

// From Groundwork, chapter 5 (ch05-repetition), box 4.
// This example is from Groundwork, licensed CC BY-NC-SA 4.0.
// Run with: java ch05_04.java