object Example
  def foo(x: Int): Either[Exception, Int] = ... etc
  def bar(x: Int): Either[Exception, Int] = ... etc
  def baz(x: Int): Either[Exception, Int] = ... etc
  def qux(x: Int): Either[Exception, Int] = ... etc
  ...etc

  def main(args: Array[String]): Unit = {

    val x = foo(1) match {
      case Right(x) => x
      case Left(e) => return
    }

    val y = bar(x) match {
      case Right(y) => y
      case Left(e) => return
    }

    val z = baz(y) match {
      case Right(z) => z
      case Left(e) => return
    }

    val a = foo(z) match {
      case Right(a) => a
      case Left(e) => return
    }

    ...etc
}