1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
●●●●●●● ● ●●● ● ● ● ●●● ●●●●●●● ●● ● ● ● ●●●●●●● ● ● ● ● ●●●●●● ● ● ● ● ● ● ● ●● ● ● ● ●●●●●● ●● ● ● ●●● ●●