BOULDER — Colorado offensive coordinator Sean Lewis knows one speed. Fast. Lewis wants the Buffaloes to think fast, move fast and — if all goes well — score fast. But we’re getting ahead of ourselves a little here. Lewis isn’t thinking about next fall or the scoreboard. Neither is Lewis looking ahead and thinking about how the Buffs’ offense will operate and execute when it takes the field against the likes of TCU, Nebraska, Colorado State, Oregon or USC. Lewis is thinking about today and tomorrow. He is concentrating on spring ball, consumed with making sure his players understand the…