My Minecraft is not working? How so?

When I open Minecraft it's all good

But then comes the MOJANG logo!

Now comes the problem:; ((

the Mojang logo remains and nothing happens.

I once ran it through a whole night, but it's still nothing different / happened the next day!

.minecraft folder delete but before your worlds save times minecraft restart

OK thanks

but I have already done that!

Ps: play on servers

Try to reinstall it.