Take one more photograph of the same object you have been observing the last 4 days.
Use it to compile some sort of final assemblage that shows all of the change over time. This might be a collage (the image below was created with Picmonkey)
Life of a rose, over 5 days.
Or you could make it a video, or an animated GIF:
Tweet your response to @agoraUdG and be sure to include the hashtag #agoratry128
Don't Want to Tweet Your Response? Really?