He selects the worker, and the worker starts.
It has now been 8 weeks, and the worker finished. The rich man was on his way to inspect the house and then, if it was perfect, he would give the worker his money. The worker is in front of the house, and he sees the rich man coming to inspect it. then, in horror, he looks and sees a brick that has not been used. The house is not perfect. Worrying, he sits on it. He realizes that won't work. so, he THROWS IT UP IN THE AIR.