Just like stepping stones could be put in a river, or stepping stools could be put in a house, hover bricks could be placed on stairs in a chained fashion to serve as an semiautomatic escalator.

When stepped on, each brick will inflate, and after leaving (for n seconds), a brick will deflate. It is that simple.

正像人们可以在河流中放垫脚石修百步桥，或者在屋子里放垫脚蹬一样，如果把气垫砖放在楼梯上一个接一个，就可以成为一个可以替人代步的半自动的天梯。

当人踏上气垫砖的时候， 气垫会充气。当人离开以后几秒（可调），气垫会泄气。就那么简单的一个装置，却可以方便千家万户。