How to stop turtle when in position -200, 0

Question

How to stop turtle at -200,0 When i set it to = -200, 0 it says invalid syntax

t.speed(20)
t.goto(-200, 0)
t.color('red')
t.fillcolor('yellow')
t.begin_fill()
t.width(3)
while True: 
    t.fd(400)
    t.lt(170)
    if abs(t.pos()) < -201:
        t.end_fill()
        break
t.mainloop()              

Answer 1

This test has some problems:

if abs(t.pos()) < -201:

The abs() of any number can't be less than a negative number. Also, pos() doesn't return a number, it returns a tuple. I'm guessing what you really want is:

if t.distance((-200, 0)) < 1:  # turtle positions are float, not exact

Complete solution:

import turtle

turtle.speed('fastest')
turtle.setx(-200)
turtle.width(3)
turtle.color('red', 'yellow')

turtle.begin_fill()

while True:
    turtle.forward(400)
    turtle.left(170)

    if turtle.distance((-200, 0)) < 1:
        break

turtle.end_fill()

turtle.hideturtle()
turtle.mainloop()

Output:

Note that fill pattern is system dependent in this case due to lines crossing.