title: Python 3 Tkinter canvas
body: <p>I am trying to draw a clock that works. I am using a 600x600 form. I cant' figure out how to place the oval in the center of the form or how to add the minutes or the seconds tick marks inside the oval. I tried dash but couldn't get it to look right. Any suggestions. Thanks in advance.</p>
  
  <p>This is what I have done so far:</p>
  
  <pre><code>from tkinter import *
  
  canvas_width = 600
  canvas_height = 600
  
  master = Tk()
  
  w = Canvas(master, width = canvas_width, height = canvas_height)
  
  w.pack()
  
  oval = w.create_oval(75,75,500,500)
  minline = w.create_line(150,150,300,300)
  
  mainloop()
  </code></pre>