input.onButtonPressed(Button.A, function () {
    schalter = 1
})
input.onButtonPressed(Button.B, function () {
    schalter = 0
})
let schalter = 0
schalter = 0
basic.forever(function () {
    if (schalter == 1 && pins.digitalReadPin(DigitalPin.P0) == 0) {
        pins.digitalWritePin(DigitalPin.P3, 1)
    } else {
        pins.digitalWritePin(DigitalPin.P3, 0)
    }
})