Visualizing the Ducci Sequence
Below is a graphic showing the Ducci sequence for a 6 tuple, but then divided into two lines covering the first half of the tuple and the second half to form x,y,z coordinates. The Ducci sequence starts with an n-tuple; to calculate the next entry in the sequence you take the absolute value of the difference between the number next to the position. Continue this until you get to all 0s or some repeating pattern. I also have a scatter plot available.