In Guernica, Picasso uses monochromatic color and contrasting light and dark to depict the horrors of war.
As you can see, this thesis introduces the name of the artwork, the artist, two major artistic elements AND the message the artist is conveying. That is what your thesis is expected to do.
Paragraph 2 will discuss the the first artistic element from your thesis. Describe in detail how the artist used this particular element to help convey his/her message. Descirbe the image, showing how a specific artistic elelment helped the artist convey the message he intended
Paragraph 3 will discuss will discuss the the second artistic element from your thesis. Describe in detail how the artist used this particular element to help convey his/her message. Descirbe the image, showing how a specific artistic elelment helped the artist convey the message he intended.
Paragraph 4 will tell the reader why the image is important. What impact does it have on us? Incorporate details from your other paragraphs to help support your point. Make sure to keep this paragraph in third person even if you are writing why the image is of importance to you. This paragraph should relate the purpose the artist had for creating his/her work.