for (var i = 0; i < this.height; i++) {
            for (var j = 0; j < this.width; j++) {
                for (var k = -1; k < 2; k++) {
                    for (var l = -1; l < 2; l++) {
                        if (l == 0 && k == 0) continue;
                        if (i + k < 0 || j + l < 0 || i + k >= this.height || j + l >= this.width) continue;
                        this.surroundings[i][j] += this.state[i + k][j + l] == "bomb";
                    }
                }
            }
        }