Dragging items between lists

I have 2 Container and they have 2 lists. These lists can draggable, I want to add new list intside to my main list and these are will be draggable too. I want to transport the list (this is which I want) to another container. Actually I find to example but I can’t combined to them.( https://jsfiddle.net/7ut5wk3j/3/ and https://github.com/TylerPottsDev/drag-n-drop).