Help With Code for alarm

' {$STAMP BS2}
' {$PBASIC 2.5}
lcd       PIN 15
ping      PIN 14
baud      CON 32
pb        PIN 2
light     PIN 0
bicolor   PIN 1 'if you do not have a bi color then set this to 8

VARs:
LcdBkSpc        CON     $08             ' move cursor left
LcdRt           CON     $09             ' move cursor right
LcdLF           CON     $0A             ' move cursor down 1 line
LcdCls          CON     $0C             ' clear LCD (use PAUSE 5 after)
LcdCR           CON     $0D             ' move pos 0 of next line
LcdBLon         CON     $11             ' backlight on
LcdBLoff        CON     $12             ' backlight off
LcdOff          CON     $15             ' LCD off
LcdOn1          CON     $16             ' LCD on; cursor off, blink off
LcdOn2          CON     $17             ' LCD on; cursor off, blink on
LcdOn3          CON     $18             ' LCD on; cursor on, blink off
LcdOn4          CON     $19             ' LCD on; cursor on, blink on
LcdLine1        CON     $80             ' move to line 1, column 0
LcdLine2        CON     $94             ' move to line 2, column 0
Scale           CON     $200 
LcdCC0          CON     $F8             ' define custom char 0
LcdCC1          CON     $F9             ' define custom char 1
LcdCC2          CON     $FA             ' define custom char 2
LcdCC3          CON     $FB             ' define custom char 3
LcdCC4          CON     $FC             ' define custom char 4
LcdCC5          CON     $FD             ' define custom char 5
LcdCC6          CON     $FE             ' define custom char 6
LcdCC7          CON     $FF             ' define custom char 7
RawToIn         CON     889             ' 1 / 73.746 (with **)
RawToCm         CON     2257            ' 1 / 29.034 (with **)
chairdist       VAR     WORD 
IsHigh          CON     1               ' for PULSOUT
IsLow           CON     0
rawDist         VAR     WORD            ' raw measurement
alarm           VAR     BYTE
rawlow          VAR     WORD
rawhigh         VAR     WORD
Inde:
SEROUT lcd, baud, [noparse][[/noparse]lcdoff]
SEROUT lcd, baud, [noparse][[/noparse]lcdon1]
SEROUT lcd, baud, [noparse][[/noparse]lcdcls]
SEROUT lcd, baud, [noparse][[/noparse]lcdblon]


Author:
SEROUT lcd, baud, [noparse][[/noparse]lcdline1,"Author",Lcdline2,"Shane Patterson"]
PAUSE 1000
SEROUT lcd, baud, [noparse][[/noparse]lcdcls, lcdline1, "A.K.A", lcdline2, "Tryx"]
PAUSE 1000
measure:
SEROUT lcd, baud, [noparse][[/noparse]lcdcls,lcdline1, "Click Button", lcdline2, "With Chair"]
DO
LOOP UNTIL pb = 1
HIGH light
LOW bicolor
PAUSE 250
GOSUB pingm
LOW light
rawdist = chairdist
rawdist = 0
SEROUT lcd, baud, [noparse][[/noparse]lcdcls, lcdline1,"Great"]
PAUSE 1600
alarms:
SEROUT lcd, baud, [noparse][[/noparse]lcdcls, lcdline1, "Arming"]
PAUSE 100
SEROUT lcd, baud, [noparse][[/noparse]lcdbloff]
PAUSE 100
SEROUT lcd, baud, [noparse][[/noparse]lcdblon]
PAUSE 100
SEROUT lcd, baud, [noparse][[/noparse]lcdbloff, lcdoff]
alarm = 0
PAUSE 500
alarmloop:
PAUSE 100
GOSUB pingm
rawlow = rawdist - 0
rawhigh = rawdist + 0
IF rawlow < chairdist THEN alarmLOOP
IF rawhigh > chairdist THEN alarmloop
SEROUT lcd, baud, [noparse][[/noparse]lcdon1, lcdblon, lcdline1, lcdcls, " ALARM"]
HIGH light
LOW bicolor
PAUSE 100
SEROUT lcd, baud, [noparse][[/noparse]lcdbloff]
LOW light
PAUSE 100
SEROUT lcd, baud, [noparse][[/noparse]lcdblon]
DO
LOOP UNTIL pb = 1
GOSUB alarms





END
pingm:
rawDist = 0
Ping = IsLow                          ' make trigger 0-1-0
  PULSOUT Ping, 5                 ' activate sensor
  PULSIN  Ping, IsHigh, rawDist         ' measure echo pulse
  rawDist = rawDist */ Scale            ' convert to uS
  rawDist = rawDist / 2                 ' remove return trip
  RETURN