I've edited one of the codepens provided by Greensock and I've pretty much got what I need (minus the formatting don't judge me!) I'm having trouble though with using multiple dropAreas, I've set up the 15 divs I need as drop areas but can't get the JS to run through them all. I tried copying what was already there and applying the next div variable to it but then it only works for the last one.
Probably not explaining this well but you'll see in the javascript I've got dropArea1 which works fine, then dropArea2 later on overrides this so dropArea1 no longer works but dropArea2 does.