Please help me work thru this....
I have a bartender moving back & forth behind his bar. I have 3 shot glasses lined up on the bar in a different layer so the bartender moves behind the shots.
The concept is I pick up the end shot & throw it at the bottles behind the bar. The line of shots should shift down so I could grab/throw another. Then when the bartender passes by them he will place out new ones to make there be a total of 3 laid out again.

any ideas to help get me started on this event
Thanks