This project is an example of how to move a sprite to the position of a clone as requested by @OverTheMoonAgain Press <space> to move the position of the X sprite to a randomly chosen clone. Note that as it is random it can choose the same clone consecutively!
I have added comments within the project, so please "See inside" The basic idea is that all the clones have a cloneID which is a number to identify them by. To make this obvious I have given each clone a costume of its number. Each clone stores its X and Y positions in cloneX and cloneY lists. So clone 4's Y position is "item 4 of cloneY". As a comment on general coding style, please note there is just one "Green Flag" script with just one Forever loop. This prevents any initialisation or synchronisation problems ;)