Something I'm reading reminded me of nightingale floors. And free association led me to something Id read about flooring that generated power from footsteps and was bio-luminescent as well.
Which led to this image od a ninja confronted by a floor where the boards light up in different colors *and* played an associated note as you walked on them.
Talk about chalenging!
I bet everyone who used it would have an associated tune. Which would alert the guards as well as "announce" a visitor.
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