title: Make groups of radiobuttons
body: <p>Is it possible that I create two different roups of radiobuttons.
  I now have 4 radiobutttons with only one option. I want to 2 groups with 2 options
  so i can click two options.</p>
  
  <p>the code now:</p>
  
  <pre><code>Radiobutton(root, text="Ja", variable=var, value=1,
                    command=setValueTrue).grid(row=0,column=8)
  
  Radiobutton(root, text="Nee", variable=var, value=2,
                    command=setValueFalse).grid(row=1,column=8)
  
  Radiobutton(root, text="Ja", variable=var, value=3,
                    command=setValueTrue1).grid(row=3,column=8)
  
  
  Radiobutton(root, text="Nee", variable=var, value=4,
                    command=setValueFalse1).grid(row=4,column=8)
  </code></pre>