====== Calliope coding music+leds on-off ======
input.onButtonPressed(Button.A, () => {
    basic.showLeds(`
    . . # . .
    . . # . .
    . . # . .
    . . # . .
    . . # . .
        `)
    while (!(input.buttonIsPressed(Button.B))) {
        control.waitMicros(4)
        music.playTone(262, music.beat(BeatFraction.Whole))
    }
})