(function(){
    'use strict';
    var xMax, yMax, obj, objHeight, objWidth, speed, t;
    xMax = document.getElementById('content').clientWidth;
    yMax = document.getElementById('content').clientHeight;
    obj = document.getElementById('movable');
    objHeight = obj.clientHeight;
    objWidth = obj.clientWidth;
    obj.style.left = '0px';
    obj.style.top = '0px';
    speed = 5;
    t = 40;
    
    console.log('Div height: ' + yMax + ', Div width: ' + xMax);
    console.log('Object height: ' + objHeight + ', Object width: ' + objWidth);

    function move(){
        obj.style.left = parseInt(obj.style.left) + speed + 'px';
        if(parseInt(obj.style.left) + speed > (xMax - objWidth) || parseInt(obj.style.left)+ speed < 0){
            speed = speed - (speed * 2); 
            console.log('Current speed: ' + speed);
        }
        window.setTimeout(move, t);
    }
     move();
}());