Before Today - Staring At Backgrounds tab

this wierd i was trying to make my own song and accidently played this then later 
out it sounded exactly like the song

e--------2-0---------------2-0---------------------------|b--2-0----------2-0--2-0---------------------------------|g--------------------------------------------------------|d--------------------------------------------------------|a--------------------------------------------------------|e--------------------------------------------------------|
not so sure about after that this sounds ok
e-----------------------------------------------------------------------|b-----------------------------------------------------------------------|g-----------------------------------------------------------------------|d-xxx--2--xxx--2--xxxx-xxx--2--xxx-2-xxx--------------------------------|a-xxx--2--xxx--2--xxxx-xxx--2--xxx-2-xxx--------------------------------|e-xxx--2--xxx--2--xxxx-xxx--2--xxx-2-xxx--------------------------------|
then intro again
then() means quickly strum (xx)e---------------------------------2x-------------------------------------------------|b---------------------------------2x---(mute quickly)--------------------------------|g---------------------------------2x-------------------------------------------------|d--x-x-x--2---(xx)--x-x-x--2---------------------------------------------------------|a--x-x-x--2---(xx)--x-x-x--2---------------------------------------------------------|e--x-x-x--2---(xx)--x-x-x--2---------------------------------------------------------|
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