Fan switch example is really intriguing. I was wondering if there is a similar method to repeatedly turn the fan on and off. With Greyelf's cool example above it works for just one cycle.
I put together my own solution for a Space Colony game I'm messing around with. It stretches over three pages (which is pretty cumbersome). It'd be great to try to use the new (hidden:) etc.
Resarch Topic Contents
Passage 2, "openrt"
Passage 3, "rti"
<!-- Research Topic Information-->
This contains useful information contained inside the Research Topic.
Passage 4, "closert"