Okay, using your example, as there are Nine Justices, in order for only one to be appointed for each 4 year term you would have to stagger the appointments.
1. How would you work that from a starting point needing all nine seated at any one time?
2. If you could establish it somehow, then how do you prevent a two- term President from appointing a majority during his term in office?
3. How would you deal with deaths before a term was completed?