Enact a new rule, “Drops”:-

A Block is an arrangement of four Modules, in one of the shapes depicted at [[:File:Tetrominoes.png]].

If no Drop post exists, any Architect (or the Supervisor) may make a blog post unambiguously describing the shape and Module arrangement of a single Block of their choice, listing the Modules in the order of the numbers on the shape’s depiction. (eg. “An T-Block of Dock, Corridor, Power, Dock.”) Such a blog post is known as a Drop post.

If a Drop post exists and an Architect has not already done so for that Drop post, they may add the Modules of its Block to their Site, one Module per square, overwriting the previous contents of that square: Modules which are adjacent on the Block must be similarly adjacent on the Site, although the Block may be rotated 90, 180 or 270 degrees. Adding a Block in this way is known as Building.

If all Architects have Built in response to a Drop post, any Architect may close that Drop post with a comment to that effect. Upon doing so, it ceases to be a Drop post.