title: i keep getting an error when i try and import turtle
body: <pre><code>import turtle
  window = turtle.screen()
  myTurtle.forward(100)
  myTurtle.left(90)
  myTurtle.forward(100)
  
  window.mainloop()
  </code></pre>
  
  <p>I get this error when I try and use the code above and not sure why, because its the same as my lecturers slide show, I just wanted to test it for myself.</p>
  
  <pre><code>Traceback (most recent call last):
  File "/Users/ruairimangan-cliff/Desktop/Foundations of Computer Programming/week 4/Week 4 'Functions'.py", line 72, in &lt;module&gt;
  window = turtle.screen()
  AttributeError: 'module' object has no attribute 'screen'
  </code></pre>