Blink maqueen

basic.forever(function () {
    maqueen.writeLED(maqueen.LED.LEDLeft, maqueen.LEDswitch.turnOn)
    maqueen.writeLED(maqueen.LED.LEDRight, maqueen.LEDswitch.turnOff)
    basic.pause(500)
    maqueen.writeLED(maqueen.LED.LEDLeft, maqueen.LEDswitch.turnOff)
    maqueen.writeLED(maqueen.LED.LEDRight, maqueen.LEDswitch.turnOn)
    basic.pause(500)
})