lobby addSlot: #mainWindow valued: (WindowSceneElement newWidth: 800 height: 600) `>> [
    parents: {
        WindowSceneElement.
        PaintSolidBackground.
        PaintChildren.
        PassInputToInputHandler.
        PassPointerToChildren}.].

lobby inspectOn: mainWindow.

inform: '***********************************************'.
inform: '** To start the event loop, do the following:'.
inform: '** mainWindow eventLoop.'.
inform: '** '.
inform: '** Left-click:  inspect in current inspector'.
inform: '** Right-click: open new inspector'.
inform: '***********************************************'.