import turtle

# Create a window and a “turtle” pen
screen = turtle.Screen()
screen.title("Hogwarts badge sketch")
pen = turtle.Turtle()
pen.speed(3)

# Draw a triangle (one side of a house crest)
for side in range(3):
    pen.forward(100)
    pen.left(120)

pen.hideturtle()
screen.mainloop()   # keeps the window open until you close it