Lack of pipes and wires indicates install not completed.
Glass paint on bare tile cleaned with alcohol. The apple is freehand. Lettering prepared on computer and printed mirror image via PDF then gimp. Traced with a fine brush through a pane of glass lit on the template side. Letters gone over with brush to darken. Then edges tidied with an art scalpel. Next steps are baking the tiles then gluing to the posts with construction adhesive.
Just noticed the ocean temp chart gone crazy. Probably failure or data anomaly. Possible sign of incoming weirdness.