I REALLY need to delete my account (QUICKLY, my parents dont know) i need something fast and easy!! PLEASE : )

Yeah so im stupid and didnt ask my parents b4 i got my im and they told me if they ever found out i got 1 id b grounded so i need the quickest and easiest way to delete it (im comp. illiterate) PLEASE HELP A STUPID PERSON OUT!!!!!!!!!!!!!!!!!!!!!!!!! THANK YOU SSSSSSSSOOOOOOOO MUCH!