O=O ; You breathe it, it's dioxygen. ↓ This is not a molecule, it's Africa. Each circle represents a country and each line represents a border. Position and size doesn't matter. African countries are naturally hard, but if you know them well, it's easier.
EVERY border counts between African countries
Countries without any land border have their maritime border in dotted lines
If one circle can correspond to multiple countries, use the sea.