Cat on the Roof is the work of painter Paul T. There is a big black cat standing on the yellow roof. The yellow roof symbolizes desertification and the black cat symbolizes death, which shows the harm of environmental damage to human beings. In order to express this theme, emphasize the harm and warn people, the author mainly uses the method of proportion inversion. Deliberately draw the cat's body very big, highlighting the threat of death.

In this work, the author painted the cat black to show his death. In life, people often use colors to express certain emotions because of their psychological association with colors. For example, red represents warm and cheerful feelings or lively atmosphere, blue represents sad and melancholy feelings or quiet atmosphere, and black has many meanings such as solemnity, dignity and death. But why the author uses the cat to symbolize death, besides the emotional expression of color, it should also be related to the meaning of the image of the cat.