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To: python-list@python.org
From: Terry Reedy <tjreedy@udel.edu>
Subject: Re: Help with pygame
Date: Tue, 16 Jul 2013 20:10:12 -0400
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On 7/16/2013 1:29 PM, Daniel Kersgaard wrote:
> I'm having a little trouble, tried Googling it, but to no avail.
 > Currently, I'm working on making a snake game, however
 > I'm stuck on a simple border.

To give a variation of the other answers, it would be easier if you drew 
the four sides more symmetrically, in something like the following order:

top (including both top corners)
bottom (including both bottom corners)
left (omitting both left corners)
right (omitting both right corners)

Including the corners with the sides instead of the top and bottom would 
be okay. So would be including one (different) corner with each line. 
Just pick a scheme that does each one once. Using the above, if 0, 0 and 
X, Y are upper left and bottom right corners,
and we use inclusive ranges:

top: 0, 0 to X, 0  # includes corners
bot: 0, Y to X, Y  # includes corners
lef: 0, 1 to 0, Y-1   # excludes corners
rit: X, 1 to X-1, Y-1 # excludes corners

-- 
Terry Jan Reedy