自然大调 [自然大调]

$$ \begin{array}{ccccccc} \text{一} & \text{二} & \text{三} & \text{四} & \text{五} & \text{六} & \text{七} \\ 0 & 2 & 4 & 5 & 7 & 9 & 11 \end{array} $$

let bpm = 180
1 2 3 4 5 6 7 ^1