A black stone rolling around in a white lake, Surrounded by trees, that protect me from the outside, Cross a bridge to reach my twin sister, We overflow when disturbed or overwhelmed. What am I?

What am I? You mount your steed and prepare for a race, they look so focused with their painted face. the music begins and you start to give chase. After many laps you're still in the same place.

Born from one man's name but shared by all, I wear a tux though I don't attend the ball. I quietly run the web, your phone, your cloud, my code is open - contributors proud. Type a command and I'll bend to your will - what am I?

I am a room, usually wide I'm in a gun, usually holding the bullet You can see me in a revolver, but I'm also a place cleaned by maids

I am used to deliver ideas old and new, but I am not used to only tell what’s true. You can find me in Places open to learn but also closed and burned .