coundown problem on LCD

[SuB-ZeRo]

Hi everybody.
i again have problem with pic
i am trying to countdown the hours minutes and seconds
like 01:19:49 and lcd will show the countdown
if i press button1 i want to add 30 minute
i start like this
second VAR BYTE [59] 'I WANT TO LIMIT THE TIME
minute VAR BYTE[59]
hour VAR BYTE[59]
second=0 'start with 0
minute=0 'start with 0
hour=0 'start with 0
button porta.4 ,0,0,0,b1,1,plus_the_count
simlpy my codes re like these but the compiler allways give error
(unable to fit second)
after then i try it basicly
'''''''''''''''''''''''''''''''''''''''''''''''''r eal codes for 16F628'''''''''''''''''''''''''''''''''''''''''''' '
DEFINE LCD_DREG PORTB
DEFINE LCD_DBIT 4
DEFINE LCD_RSREG PORTB
DEFINE LCD_RSBIT 0
DEFINE LCD_EREG PORTB
DEFINE LCD_EBIT 3
DEFINE LCD_BITS 4
DEFINE LCD_LINES 2
DEFINE LCD_COMMANDUS 2000
DEFINE LCD_DATAUS 50
saniye var byte[59]
dakika var byte[59]
saat var byte[59]
saniye=0
dakika=0
saat=0
loop:
saniye = saniye -1
if dakika =00 then saat= saat-1
LCDOut $FE,1 'ekranı temizle
lcdout "KALAN SURE"
LCDOut $Fe,$C0
LCDOUT #saat,":",#dakika,":",#saniye
pause 1000
goto loop
end
'''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''end'''''''' ''''''''''''''''''''''''''''''''''''
and still have problem "unable to fit variable saniye"
how can i limit the numbers when reverse counting?