In Linear Mandala, a single participant wears a custom headset outfitted with an electroencephalography (EEG) sensor. The participant walks alongside a row of monitors and speakers. Video, sound, and the physical headset are designed to support contemplation. In real time, a shadow-like avatar pushes a ball of objects representing each participant's brain activity. The participant must maintain a consistent brain state for the avatar and ball to move forward in tandem with his physical movement.