I am working on a Monaco editor to automatically trigger scroll events. So far example if I press 'a' then it will automatically trigger scrolling until another key is pressed. The code works fine in a plain html page but when monaco editor is used it is not working. This is the code in jsfiddle.

    var speed = 100;
    function pageScroll() {
        if(speed == 0) return;
        document.getElementById("container").scrollBy(0,50); 
        setTimeout('pageScroll()',speed);
    }

Full code on jsfiddle

https://jsfiddle.net/L7uekp2b

Can anyone suggest me what's wrong with the code.