My program is not doing what it's supposed to be doing:

My program is not doing what it's supposed to be doing: If turtle's x coordinate is >= 250 or turtle's x coordinate is <= -250 or

  turtle's y coordinate is >= 250 or turtle's y coordinate is <= -250

    Move turtle -5px (back on screen)

    Get a new random number between 0 and 360

    Set turtle's direction to the new random number.

Here is my code:

import turtle

import random

#initalize window

win = turtle.Screen()  

print("Default Screen Size")#sets screne size

win.bgcolor("indigo") # sets the background color

win.title ("bounce") #title of screne

win.setup(500,500)#sets costom window size

#create turtle object

jack = turtle.Turtle()

# use a turtle image to represent jack

jack.shape("turtle")

jack.color("black")

jack.pendown()

jack.forward(5)

while True :# jack is range (-250,250):

  jack.forward(5)

  if jack.xcor()>= (250) or jack.xcor()<=(-250):

    jack.backward(-5)

    jack.right(random.randint(1,360))

  elif jack.ycor()>=(250 ) or jack.ycor()<=(-250):

    jack.backward(-5)

    jack.right(random.randint(1,360))