This will blink an LED on any pin, as specified in the BLINK_TEST define.
If the define is commented out, it will bypass the blinky and start at the main program.
Code:
DEFINE BLINK_TEST PORTB,0
'
' Variables, Constants etc.
'
;----[Blinky test]------USE( DEFINE BLINK_TEST PORTB,0 )-----------------
BLINK_LED VAR BIT EXT
@ #undefine BLINK_LED
@ #define BLINK_LED BLINK_TEST
@ ifdef BLINK_TEST
    INCLUDE "AllDigital.pbp"
    Blink:
        TOGGLE BLINK_LED
        PAUSE 500
    GOTO Blink
@ endif