i need help with a while loop in python

it is about a rock,paper scissors game and i want the user to only be able to enter either rock, paper or scissors otherwise they would be asked to enter either of them again.

user1Selection = input("|PLAYER 1| Rock, Paper, Scissors?: ") while not user1Selection == "Rock" or user1Selection != "Paper" or user1Selection != "Scissors": print("You can only pick Rock, Paper or Scissors!") user1Selection = input("|PLAYER 1| Rock, Paper, Scissors?: ") 

i have been trying different things but it would not work.

I also tried

user1Selection = input("|PLAYER 1| Rock, Paper, Scissors?: ") while user1Selection != "Rock" or user1Selection != "Paper" or user1Selection != "Scissors": print("You can only pick Rock, Paper or Scissors!") 

but it did not work either