10F222 wake/sleep

[AvionicsMaster1]

Ladies and Gents,

I've been playing around with the 10F222 and its sleep/wake on pin change. Not trying to show my ineptness here but what do they mean by reading the input pins? This code works:

CLEAR
DEFINE OSC 4
adcon0 = 0         ' Turn off ADC
option_reg = %00001000       ' enable wake on pin, weak pull ups, prescaler to wdt         
osccal = %00000000            ' oscillator calibration
trisio = %1101      ' GP1 only is output
gpio = 0 ' turn everything off

LED VAR gpio.1
i VAR BYTE

start_here:

IF gpio.0 = 0 THEN GOSUB Light_LED
IF gpio.3 = 0 THEN GOSUB Light_LED
SLEEP 5

GOTO start_here

Light_LED:
i = 0
    FOR i = 0 TO 3
    TOGGLE LED
    PAUSE 8000
    NEXT i
RETURN

END

I'd like to know if I did it right or is there something more subtle, or bodacious, I should be doing.

I've, I think, attached the page and my code. Constructive help greatly appreciated.