This will get stuck and return a bad time out error if the screen stays `On`


```js 
if (window.wrappedJSObject.ScreenManager.screenEnabled === true){
            window.wrappedJSObject.ScreenManager.turnScreenOff(true);
            waitFor(
                function(){
                    console.log('The screen was turned OFF');
                    marionetteScriptFinished();
                },
                function(){
                    return window.wrappedJSObject.ScreenManager.screenEnabled === false;
           });
}
else{
        console.log('The screen was OFF no need to turn it off');
        marionetteScriptFinished();
}
```