Opazo is a city enclosed in a colorful shell. Every so often, the city closes itself for an indeterminate period of time, and re-opens with a completely different city layout. Long strands of thread document the many iterations of the city, which over the years have created a rainbow of colors that adorn the outside of the shell. However, some say the strands of color more accurately depict the relationships created between the citizens of Opazo, or perhaps the relationship between Opazo and other cities, since some threads break, some threads wear out, some grow stronger, and some grow brighter.