William says that the green satin sofa on his hotel room looks like a slime on stagnant water what does the sofa symbolize

In Tennessee William's "The Catastrophe of Success" the symbolism reflects his criticism of success. The green satin sofa in the hotel symbolized his first inital thrill of success. When it began to resemble slime on stagnant water, the effects of success wore off and was replaced with disgust.