<script src="js/TweenMax.min.js"></script>
<script>
let timeline = new TimelineMax({
repeat: -1,
yoyo: true }),
feTurb = document.querySelector('#feturbulence');
timeline.add(
TweenMax.to(feTurb, 15, {
onUpdate: function () {
let bfX = this.progress() * 0.005 + 0.015, //base frequency x
bfY = this.progress() * 0.05 + 0.1; //base frequency y
feTurb.setAttribute('baseFrequency', `${bfX} ${bfY}`);
} }),
0);</script>
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