There is a flask on the site office windowsill. It is not a good flask.
Everything here is free and stays free. No advertisements on my structure, no accounts, no one selling you a taller block. But the domain costs money and I am, technically, standing outside in the wind.
There is also a print of the tower, if you want one on a wall. That one is a real thing and it costs a real, small amount. The 🖼 button.
Buy the engineer a coffeeNothing happens if you do. No extra blocks, no special colour, no name on anything. The tower does not have a first class and I will not be building one.
Anyone on earth can read this, forever, at whatever altitude you leave it. Your country's flag goes on the block. Be kind to the people climbing past.
One tower. Everyone on earth gets one block. You pick a colour, write something short on it, carry it to the top and drop it onto everything that came before. Your country's flag goes on the side. Then it's there.
The tower will be moving while you do this. That is not a flaw in the site, it is a flaw in the sky. Wait for the top to swing back underneath you, and let go. Miss, and your block slides off the edge and you start again.
Drop it badly while the wind is up and the tower is tall, and the top few blocks come off — three, or as many as eight if you were really quite careless. The tower stays. Everything below the shear is untouched.
The blocks that come off are not deleted. They land in the grass at the foot of the tower and stay there, still readable, forever. Go down and read them. Some of them are very good.
The site report tells you the wind speed. It has always told you the wind speed.
Scroll, drag or use the arrow keys to climb. The scale on the right is metres above the slab, with notes on what you have just overtaken.
If a block stops you — and one of them will — you can put a hand on it. Nothing visible happens. No number appears anywhere. But the person who wrote it will find out, next time they come back, that somebody stopped. The blocks people touch go smooth over time, the way a handrail does. That is the only trace.