So I was breaking blocks and one block that I broke Was stayed but I could walk on through it and it looked like an ex ray glitch. I tried placing blocks but they there invisible but they were still there. This is not the first time this happened.

Broken graphics drivers.

Please update your graphics card drivers following these instructions: Updating Graphics Card Drivers.

• If you are using Java arguments to increase the amount of memory, please reduce it to the default 512MB.

• Do not rely on automatic searches for driver updates.

• Do not use Windows Update or Device Manager - Microsoft doesn't install OpenGL, they promote DirectX.

• If you know the brand and type of your graphics card, go to the links provided above and search manually for the most recent driver for your card. The automatic detection tools of the card manufacturers are not recommended.

If all that won't help, please use the Mojang Support Center.