The trash building is a building that can be unlocked by completing Level 1 and successfully deliver 30 of these 
gray circle shapes. It is one of the first and sometimes essential buildings to be achieved along with the Cutter.
The trash building destroys all shapes from any input, which is useful for unclogging the Cutter and the conveyors if necessary. Conveyors can be unclogged necessarily with the Storage, since it also acts as an overflow gate.