Hello easygamemaker, thanks for your quick reply and your effort.
I actually hadn't seen the loop in the animations. That's the first solution to the problem. :)
However, I have another problem with your two options. I use the create object function with an explosion animation to destroy an enemy object. But the explosion must then of course take place in the same place where the original enemy object was.
In the copter game, this was solved with the expression $copter.x and .y.
How do I have to declare the variable and what is it called if I want to use the last position of the enemy object?
Thank you very much for your help.