節拍器
https://makecode.microbit.org/_5oA6YfUdufsf
let volumn = 0
let beat = 0
let number = 0
basic.forever(function () {
number += 1
beat = number % 4
if (beat != 0) {
volumn = 100
} else {
volumn = 250
}
music.setVolume(volumn)
music.playTone(150, 50)
music.rest(200)
})