// test your implementation
// you should do it line by line
// aquire the global StreamingConnection
var streamingConnection;
lively.net.StreamingConnection.getInstance(function(connection) {
    show('Got a connection');
    streamingConnection = connection;
});
// publish the drawing canvas
var canvas = $morph('DrawingCanvas');
streamingConnection.publish(canvas);
// when everything went well, you should see your stream in here
Global.inspect(streamingConnection.availableStreams);
// now, there should be an id in the streamingConfig
var id = canvas.streamingConfig.streamId;
// so we can subscribe to the stream by id
var stream = streamingConnection.subscribe(id);
// open a viewer where we hopefully see our echo
// put it somewhere in the world and draw on the canvas!
stream.openViewerInHand();
// unsubscribe, if you have seen enough
stream.unsubscribe();
// and unpublish...
streamingConnection.unpublish(id);
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^ You can draw here! ^