I would like to add some motion blur  on a div with SVG filter   for example: <feGaussianBlur id="hue1feGaussianBlur" in="SourceGraphic" stdDeviation="0 0" />   to   <feGaussianBlur id="hue1feGaussianBlur" in="SourceGraphic" stdDeviation="30 0" />   But how do i tween only the first value of the stdDeviation?   i would guess it should bes something like this, but i get an error: tl.to("#hue1feGaussianBlur", .3, {attr: {stdDeviation