I have for years wanted to build a digital clock using water. I believe fluid gates and transistors are a thing, but they probably depend on a substantial flow/

I have for years wanted to build a digital clock using water. I believe fluid gates and transistors are a thing, but they probably depend on a substantial flow/current, and I imagine they'd be hard to miniaturize. So you'd need a big header tank (corresponding to a high Vcc). The display I envisaged would be a seven-segment dispay, made simply by pushing a dyed immiscible liquid in and out of transparent tubes in the display window. I expect it would be messy; imagine waking up to the morning alarm, reaching for the snooze button, and getting a bucketful of cold water tipped over your head.