Balloon parking space indicator.
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Previously:
https://www.homemadetools.net/forum/...857#post148511
https://www.homemadetools.net/forum/...368#post146483
https://www.homemadetools.net/forum/...119#post141325
https://www.homemadetools.net/forum/...915#post133647
https://www.homemadetools.net/forum/...313#post116359