The schematic could not be more simple
As an alternative you can omit the switch and use an old USB cable to provide the the 5vdc (usually RED cable) and the Ground (usually BLACK cable) this way you can have a romantic companion for your computer...

Code:
5vdc (Vdd)
    +          PIC12F675
    |    _/       ___
    '--o/  o----o|°  |o------------------.
               -o|   |o-  Amber (Clear)  |
               -o|   |o-     LED         |
               -o|___|o------>|----------o
                                        |
                                        |
                                       ===
                                       GND