I'm not sure if you've lied to someone you care about, but let's make an easy one up, shall we? If you don't wanna copy this, I'll give you some help and examples.
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Say you took some money from a friend or something. Next thing you know they're looking for that money but they cant find it anywhere and they were planning on taking the two of you to the movies, but when they couldn't find their lost of money, they cancel the plans and ask if you've seen it. This is where you say, "No, I'm sorry. I hope you find it though." Theres your lie.
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Another thing you could do is explain when, how, and the reason you lied about, well, lying. You could try squeezing a few words in there, but well, I'm not the best with help.
I apologize.