title: How to add border to a button in python for Tkinter?
body: <pre><code>b1 = Button(tk, text=" ", font=("Consolas 30 bold"), height = 1, width = 4,bg = "white", command=lambda:checker(b1))
  </code></pre>
  
  <p>What piece of code to I add to this to add a border to the button, as in making it thicker?</p>