gistfile1.txt

trait Swimmer {
  def swim() = println("Swimming...")
}

abstract class Bird {
  def fly() = println("Flying...")
}

class Duck extends Bird with Swimmer {
  def talk() = println("Duck duck")
}

var duck = new Duck
duck.talk // Duck duck
duck.fly // Flying...
duck.swim // Swimming...

class Athlete {
  def run() = println("Running...")
}

var phelps = new Athlete with Swimmer
phelps.run // Running...
phelps.swim // Swimming...