simple picaxe pir

main:
readadc 1,b1  'pir sensor
readadc 4,b4  'ldr sensor
if b1> 0 and b4> 100 then sethigh  'turn on siren alarm
if b1> 0 and b4< 100 then sethigh2  'turn on flood lights and siren alarm
if b1= 0 then setlow  'nothing is around all quiet
goto main

sethigh:  'siren only
high 0
goto main

sethigh2:  'siren and lights
high 0
high 2
goto main