"Maybe tartans will replace flags someday"

The Catalan tartan is based on the Catalan flag, which is based on an historical event. So you could be right Bubba, hehe.

Historically (or maybe once upon a time), a Catalunyan Count swiped his bloody fingers accross a shield as he died, leaving four red lines. Then it became a symbol that was incorporated later into the flag, and crisscrossing sets of four red lines are the main theme of the Catalan tartan.