from gturtle import *
Options.setPlaygroundSize(400, 400)
Michelangelo = Turtle()

figur = input("Welche Figur: Quadrat oder Kreis?")

if figur == Kreis:
    Michelangelo.rightArc(50,360)
elif figur == Quadrat:
    repeat 4:
        Michelangelo.forward(50)
        Michelangelo.right(90)
else:
    print("Fehler!")