Sequence.scala

object Sequence {
  def main(args: Array[String]): Unit = {
    val REFRESH = 100
    val ROCKET = "\uD83D\uDE80"
    val EARTH = "\uD83C\uDF0E"
    val BOOM = "\uD83D\uDD25"
    val MAX_TICKS = 20

    while (true) {
      var ticks = 0
      while (ticks < MAX_TICKS) {
        Thread.sleep(REFRESH)
        println("\033[2J\033[1;1H")
        println(s"${" "*ticks}$ROCKET${" "*(MAX_TICKS-ticks)}$EARTH")
        ticks += 1
      }
      println("\033[2J\033[1;1H")
      println(s"${" "*ticks}$BOOM")
      Thread.sleep(2000)
    }
  }
}