I'm learning about classes on Udacity and we started by learning `turtle`. There was an exercise where you were supposed not to repeat

```
brad.forward(100)
brad.right(90)

```

four times (Brad is the turtle's name), and instead create a loop. My guess was:

```
while True:
    brad.forward(100)
    brad.right(90)
    if turtle.position() == (0,0):
        break

```

However, Brad just draws the first, upper line. What am I getting wrong? If needed, the full code is below. Thank you!

```
import turtle

def square():
    turtle.colormode(255)
    window = turtle.Screen()
    window.bgcolor(0,0,0)
    #meet brad
    brad = turtle.Turtle()
    brad.shape('arrow')
    brad.speed(1)
    brad.color(0,255,255)
    #brad creates a square
    while True:
        brad.forward(100)
        brad.right(90)
        if turtle.position() == (0,0):
            break
    turtle.exitonclick()

square()

```