[Python]Move to sidways Strings

from os import system
from time import sleep

string = input("Input String : ")
length = len(string)

string = length * " " + string + (length - 1) * " "

print(string)

while True:
    for i in range(length * 2):
        print(string[i:(i + length)])
        sleep(0.5)
        system("cls")