Well, I'm using a 12F675 and heres one of several that haven't worked:

CMCON = 7 ' Comparators OFF
ANSEL = 0 ' A/D OFF
loop: High GPIO.1 ' Turn on LED connected to PORTB.0
Pause 500 ' Delay for .5 seconds

Low GPIO.1 ' Turn off LED connected to PORTB.0
Pause 500 ' Delay for .5 seconds

Goto loop ' Go back to loop and blink LED forever
End