well for the first paragraph, you write about its description. like when it was created, the tittle, the artist, the movement it was in and etc. the 2nd paragraph would be about interpretation i think. like how you interpret it and how it makes you feel. the third paragraph is analysis. like if things are proportional, things about the colors used-like complementary colors-, and more. then the last paragraph is basically if you think that art piece was successful. hope this helps <3