Each structure in some way violates the tetravalency of carbon. One structure has eight covalent bonds to a carbon. The painting represents the struggle between a central concept of chemistry and the student's effort that strech the rule. Methane is the primary componant of natural gas and it is an important feedstock chemical. It is also the most simple organic molecule.
Leopard skin is thought to be such an exotic pattern.
This painting contrasts the most exotic and the least exotic, a plunger. The painting was orignially done for a guest bathroom in our home. This was painted to match our kitchen. . This was painted to match our living room couch. This was painted for our bedroom.