What would happen if you can't pay back an online loan directed to your checking account?

I Took Out An Online Loan for $500.00 and i lost my job and there's is now way i'm going to be able to come up with over $600.00 by the middle of feburary what can happen to me if i closed my checking account and didn't pay on it?
What would happen if you can't pay back an online loan directed to your checking account?
It all depends on where you got the loan from where did you get it from
Reply:They will sue you.