Basic scala

introduction.scala

//val cannot be change
val two = 1 + 1

//functions are object
object Timer {
def oncePerSecond(callback: () => Unit) {
while (true) { callback(); Thread sleep 1000 }
    }
def timeFlies() {
println("time flies like an arrow...")
  }
def main(args: Array[String]) {
oncePerSecond(timeFlies)
   }
}