function triangle([arg1]) {
    let n = Number(arg1);
    let height = 2 * n + 1;
    let width = 4 * n + 1;
    let space = 1;
    let dots = 1;
    let hashtags = 2 * n - 1

    console.log("#".repeat(width))

    for (let i = 0; i < Math.floor(n / 2); i++) {
        console.log(".".repeat(dots) + "#".repeat(hashtags) + " ".repeat(space) + "#".repeat(hashtags) + ".".repeat(dots))
        dots++
        hashtags -= 2
        space += 2
    }
    let middlespaces = n/2-1
    console.log(".".repeat(dots) +
        "#".repeat(hashtags) +
        " ".repeat(middlespaces) +
        "(@)" +
        " ".repeat(middlespaces) +
        "#".repeat(hashtags) +
        ".".repeat(dots))
    dots++
    hashtags -= 2
    space += 2
    for (let i = 0; i < Math.floor(n / 2); i++) {
        if (hashtags>= 0) {
            console.log(".".repeat(dots) + "#".repeat(hashtags) + " ".repeat(space) + "#".repeat(hashtags) + ".".repeat(dots))
            dots++
            hashtags -= 2
            space += 2
        } else {
            break;
        }
    }
    let dashesInMiddle = space-2
            for (let i = 0; i < n; i++) {
                console.log(".".repeat(dots) + "#".repeat(dashesInMiddle) + ".".repeat(dots))
                dots++
                dashesInMiddle -= 2
                space += 2
            }
}