The shed does not know that there is a certain order in which one 'should' do a thing. For example, if the shed has just been furnished with shelves, desk and chair, is now really a good time to decide to sand the floor? The shed does not know. Nor, one suspects, would it care. The shed only knows that the crucial thing is that no job should ever be continued for a second past the point where it ceases to be interesting. This means that a thing may comfortably be left unfinished while another thing is started or continued. The first thing may become interesting enough to continue in its own right later. Who knows? Certainly not the shed.