My Minecraft won't work

I go on in the morning and play Minecraft then I come off. In the afternoon i go on it and it doesn't work when I press play it goes on to the Mojang thing then comes straight back to the launcher.

This is my Developing Console where it went wrong.
[09:26:26 INFO]: Client> # See problematic frame for where to report the bug.
[09:26:26 INFO]: Client> #
[09:26:27 ERROR]: Game ended with bad state (exit code 1)
[09:26:27 INFO]: Ignoring visibility rule and showing launcher due to a game crash
Data\.minecraft\versions\1.7.9\1.7.9-natives-687738687179