padders

I think you'll need to add the following resources.
https://cdnjs.cloudflare.com/ajax/libs/gsap/latest/TweenLite.min.js https://cdnjs.cloudflare.com/ajax/libs/gsap/latest/plugins/CSSPlugin.min.js If you look at the download link on the GSAP homepage, then select custom and tick the TimeLineMax checkbox, it selects the items you need to import and lists the imports at the top.