Just wanted to get some ideas on what the most efficient way to do the
following is using a polled (non-interrupt) routine:

In my main program loop, the user has two pushbuttons to control the
following modes

1.  Press and release LEFT button to run mode 1
2.  Press and hold LEFT button for 2 seconds to run mode 2
3.  Press and release RIGHT button to run mode 3
4.  Press and hold both LEFT and RIGHT buttons for 2 seconds to run mode 4.

I realize there are a million ways to do this, but I need some ideas on how
to do this most efficiently.
Thanks

D

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