Drag and drop feedback using changing states

Hi Walt !

I will! But if I may, I have another question. I am working on another activity and I am facing another hurdle, two in facts.

First things first, my triggers are "click" rather than "drag&drop". I felt it was easier.

My first problem : I can't get the objects to go back to their initial place.

> I have three states (normal, dropped, dragged back) and I am using a trigger to change the state from "dropped" to "dragged back" but it does not work. The one from "normal" to "dropped" work.

My second problem : something to do with the variables

> I added a number variable to add and substract the number of elements in my grids so that the students can adjust their answer if they feel like changing it before validation. The adding variable works except when I use the substraction one  as well.

And I don't get why because I felt I have clearly thought of the different states necessary, etc... I am attaching the file.

I hope I am not too much of a bother...

Many thanks !