ldr programming help

plz give me programming according to change in intensity of light plz plz

plz rite pruperly and gv us more info

What kind of processor are you using ?
What language are you programming in ?
What level of experience are you at electronics ?
Which LDR are you using ? Specs ? Datasheet ?
What do you want the processor to do when you detect a chance of intensity ? Switch a relay, flash a light, make a phone call ?

Don't be lazy with your posting or you won't get any help.