while loop with the if statement in python

print ("Selection of the mode\n Easy \n Moderate \n tough")
selection = int(input("Please enter the right Choice!! > "))

while selection != '':
    if selection == 1:
        print("\ngoodluck")
    elif selection == 2:
        print('\nyou are brave')
    elif selection == 3:
        print ('\nyou must be kidding')
    selection = int(input("Please enter the right Choice!!! > "))

I am making a small program, new to python so have a bit of understanding problem, need to know my error when the user have typed in the correct selection like 1 or 2 or three it should go in a loop and run the if statement. Once that is done it should exit. But apparently that is not working perfectly.