player.onChat("12-4", function () {
    let ary = [
        [3, 4, 3, 3, 3],
        [4, 3, 4, 5, 5],
        [4, 3, 4, 5, 5]
    ];

    for (let i = 0; i < ary.length; i++) {
        for (let j = 0; j < ary[i].length; j++){
            agent.transfer(1, ary[i][j], 1);
            agent.place(FORWARD);
            agent.move(LEFT, 1);
        }
    agent.move(RIGHT, ary[i].length);
    agent.move(BACK, 1);
    }
});