lol you're funny dude. anyway google it because the unforgivable sin is not something you can do. it's when you see a miracle and are so prideful that you say Lucifer did it, the way the Pharisees did. they were so prideful that they could not accept a carpenter challenging their orthodoxy & system of rules, because it meant they'd have to relinquish control
So they stooped that low out of pride, to see the miracles Jesus was doing and to say "nope, we know it's demonic power"
and being an atheist is not wrong in itself. it's a legitimate position one can wade through in life.