Screen w/ turtle in google colab

Question

How do you fix this? I just need input of some kind for turtle. Code:

from ColabTurtle.Turtle import *
initializeTurtle()
#screen=turtle.screen  ?
def frd():
  turtle.fd(10)
screen.onkeypress(w, frd)
screen.listen

Error:

NameError                                 Traceback (most recent call last)

<ipython-input-21-479f5ebc79f2> in <module>()

.    4 def frd():

.    5   turtle.fd(10)

---> 6 screen.onkeypress(w, frd)

.    7 screen.listen


NameError: name 'screen' is not defined