solar tracker controller

[CIRE]

hello to all in the forum!
I'm new here in the forum and starter in this picbasic programming. please anyone could help me to rewrite this code.
I just added this two lines to the original code and it won't work.
the portb.0 and portb.1 connected to the H bridge.

if PORTA.1 = 0 then face_east   'limit switch1 
if PORTA.2 = 0 then hold     'limit switch2      

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@ DEVICE PIC16F84,WDT_ON,PWRT_ON,PROTECT_OFF
INCLUDE "bs1defs.bas"

start:
low PORTB.0            'pin portb.0 low 
low PORTB.1            'pin portb.1 low 
Pot PORTB.2,255,b0        'read first cds sensor
pot PORTB.3,255,b1        'read second cds sensor


if b0 = b1 then start        'if equal do nothing
if b0 > b1 then greater    'if greater, check how much greater
if b0 < b1 then lesser    'if lesser, check how much lesser

if PORTA.1 = 0 then face_east   'limit switch1
if PORTA.2 = 0 then hold       'limit switch2

greater:            'greater routine
b2 = b0 - b1        'find the difference
if b2 > 10 then cw        'is it within the range? if not go to clockwise/ solar panel facing west
goto start            'if it is in the range,do it again

lesser:                            'lesser routine
b2 = b1 - b0                    'find the difference
if b2 > 10 then ccw          'is it within the range? if not got counter clockwise/solar panel facing east
goto start                   'if it is in the range, do it again

cw:                          'turn the motor shaft clockwise / solar panel facing west
high PORTB.0                 'pin portb.0 high / facing west
pause 100                    'let it turn for the moment
goto start                   'check again

ccw:                         'turn the motor shaft counter clockwise/ solar panel facing east
high PORTB.1                 'pin portb.1 high/ solar panel facing east
pause 100                    'let it turn for the moment
goto start                   'check again

face_east:                   'facing east
low PORTB.0                  'pin portb.0 low  /stopping the solar panel for moving
low PORTB.1                  'pin portb.1 low  / stopping the solar panel for moving
sleep 14400                  'wait for 4 hours 
high PORTB.1                 'pin portb.1 high /solar panel back facing east ready for next day sun shine
sound PORTB.4,[124,12000]    'tone
pause 1000                   'wait for 1 sec
goto start                   'check again

hold:                        '
low PORTB.0                  'pin portb,0 low / stopping the solar panel for moving
low PORTB.1                  'pin portb.1 low / ----- do ----
sleep 3600                   'wait for 1 hour 
goto start                   'check again
end

'Copied from pic microcontroller project book by John Iovine