I and my bro built this its a instant building house machine with four parts to it like

this thing pushes the blocks u pllaced here |
V--------this same as [| floor soon to be walls V | |] <==========-|

[ >same as top > ] [floor inside of the soon to be building that the machine build] ( same as top )
( same as top

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these are sand> []
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tada the pistions []OOOOOO
^