Basically, every time a tween is called in my timeline, I want to recheck the value to be tweened by. `generateValue` seems to be only called once. When I resize the window every time the tween is called it uses the value it first generated.   Help would be very much appreciated!   function generateValue() { var value; // if window is smaller than 520px if ('(max-width: 520px)')) { value = $window.width(); } else { val