First, think of the different parts that your paper should contain, then collect that information:

Information Parts	Art on Campus	Social Experiment
Topic	Union Fountain	Union Zodiac
Background	history of the fountain (artist, date, origin) myths about the fountain	history of the zodiac (artist, date, origin) myths about the zodiac relationship to the fountain typical interaction people have with the zodiac (walking around it...)
Description	fountain details (statues, pool, water, colors, etc.)	experiment details (people's reactions, walking patterns, facial expressions, movements, interactions, etc.) how did you set up your experiment? (equipment, location, time, weather, etc.)
Analysis / Interpretation	what does the art symbolize? what significance does it hold on campus? what does it mean to you?	how did people act in / respond to your experiment? why did they act this way? what specific details about your experiment affected the way people responded to the experiment?
Evaluation	is this piece art? what makes it art? (does it symbolize something, hold a meaning to individual viewers, etc.?)	what did you learn about people from your experiment? why do people act in certain ways? did people act how you anticipated they would? how / how not?

Once you have the material for your paper, find a way to organize that material:

Topically / Chronologically

Fountain	Zodiac
history of the Union Fountain description of the art (parts, colors, materials, etc.) analysis of the meaning behind the art (is there a history or significance?) evaluation of the art	history of the Union Zodiac setup of your experiment (time, location, equipment, weather, etc.) description of people and interactions (reactions, walking patterns, facial expressions, movements, interactions, etc.) analysis of people's actions evaluation of your experiment (what did you learn?)

By Component

Fountain

Zodiac

history of the Union Fountain description and analysis of statues around fountain description and analysis of fountain pool itself description and analysis of the relationship to the Union Zodiac evaluation of the art

history of the Union Zodiac setup of your experiment (time, location, equipment, weather, etc.) description and analysis of the effect that time of day had on people and interactions description and analysis of the effect that the weather had on people and interactions description and analysis of the effect that the location had on people and interactions description and analysis of the effect that other specific components of your experiment had on people and interactions evaluation of your experiment (what did you learn?)

Just because there are a certain number of main sections like above, you do not have to have that same number of paragraphs in your paper. Be sure to proofread and edit!