500 rep for the first engineered pattern in Live a longer life

Currently, all the answers to Live a longer life, except the first few ones, are either found by soup search, or is a predecessor of other answers. They are discovered instead of constructed.

I offer 500 rep for the first answer with an engineered pattern. This mean that the pattern should be constructed from small parts and make use of the reactions between the parts. Some examples of engineered patterns can be found here.