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Describe a color memory: "My father worked at an R&D institute for physical training, located in a 19th-century building. They were supposed to be doing research related to sport and training technologies, but they also made some strange stuff. Once I saw a 5-foot circle that had keys on it like a piano. They were large enough to push with your feet, and when you pushed it, it shone with different color lights and made a sound like a synthesizer, so you could play a melody by stepping from one key to another. I can’t guess how it was connected to sport."