CmdUtils.CreateCommand({
  name: "echo",
  takes: {"your shout": noun_arb_text},
  preview: function( pblock, theShout ) {
    pblock.innerHTML = "Will echo: " + theShout.html;
  },
  execute: function( theShout ) {
    var msg = theShout.html+ "... " + theShout.html+ "......";
    displayMessage( msg );
  }
})