Here is the pen I am working on:   See the Pen dXKPgm by gmw (@gmw) on CodePen .   I am having difficulty getting the clouds to animate from left to right.    //select all paths whose ID begins with "cloud" $('path[id^="cloud"]').each( function( index, element ){ //move current element into var var cloud = (element); //TweenLite.set(cloud, {left:-100, top:index*40, opacity:0}); //move cloud to left of container and make invisible TweenLite.set