The Stalking Gui.

They see you, still you roam, Every step draws you closer to home. A home not yours, a voice not kind, It lives in walls, inside your mind. The lights may flicker, time may bend, But games like these don’t always end. Speak too loud, and it may hear... Run too fast, and it draws near. So walk the dark and hold your breath, You're playing tag with certain death.