Scala and expected class or object definition

Hi,

I have just downloaded Intellij Idea 14.1.1, installed the Scala Plugin, Downloaded the SDK e created a very simple object:

object Upper {
  def upper(strings: String*) = strings.map(_.toUpperCase())
}

Then I have create a Scala Script:

Upper.upper("Marcus")

When I Run the Script I receive this error

Error:(12, 1) expected class or object definition
Upper.upper("Marcus")

How can I run a script in Scala

Thanks in advance