$name   = 'Drone2';
$author = 'Bestian Tang';

require 'drones.bm';

sub main {
    enable shield;
    scan longrange;

    if (&found('enemy')) {
        move backward if &nearst('enemy') <= 2;
        disable shield;
        fire grenade;
        enable shield;
        turn left;
        move backward;
        turn right;
        redo;
    }
    elsif (&found('vault|flag')) {
        if (&damaged == 0 and &found('flag')) {
            move backward;
            fire energy;
        }
        call fetch;
    }
    else {
        turn left;
    }
    redo;
}