Why is not own.worldPosition.-z to make added objects spawn down possible?
own.worldPosition.-z
because that is not a valid code
you grab the .z like this
own.worldPosition.z
then you give it a value
own.worldPosition.z += 1.0
to go down you need a negative value
own.worldPosition.z += -1.0
or
own.worldPosition.z -= 1.0
Thankyou that answers my question.