Loop program jump another subroutine

[lockman_akim]

i give an example of my problem,

i try to make simple alarm.

i attach the vibrate sensor to pic..when sense vibrate, it will execute subroutine A but if i push button it will jump out from that subroutine A to subroutine B ..the problem is, it only read the "if" command at first it go in the subroutine A..so button will not function at all..
how can i solve this?

my program is in BASIC

alarm_on:

if portd.0 = 0 then
goto alarm_off
end if

portb.0 = 1
delayms 1000
portb.0 = 0
delayms 1000

portb.0 = 1
delayms 1000
portb.0 = 0
delayms 1000

portb.0 = 1
delayms 1000
portb.0 = 0
delayms 1000

goto start

 

[lockman_akim]

helo...anybody home???

 

[jal_rule]

it been a long time i leave basic to program uC. i used assembler to program it. any way it seem there is a mess with your if-then structure.

 

[lockman_akim]

should i use interrupt in this situation?