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Kiln Aperture Progress
A gate valve leaves part of the port open and the flow behind it keeps drifting upward.
2 free, pure-CSS effects match the "background-position" tag. Each is copy-ready and needs no library or build step.
A gate valve leaves part of the port open and the flow behind it keeps drifting upward.
The violet fill carries a striped overlay that slides sideways forever while the width stays put.