     @course.showPrompt()
     
   onClickTutorial: ->
+    clickEvent = { event: 'tutorialClicked', timestamp: (new Date).toUTCString() }
+    @recordedClickEvents.push clickEvent
+    @launchTutorial()
+
+  launchTutorial: ->
     if $('#graph-container').hasClass 'loading-lightcurve'
       @notify 'Please wait until current lightcurve is loaded.'
       return

        xMaxRelative: mark.dataXMaxRel
        xMinGlobal: mark.dataXMinGlobal
        xMaxGlobal: mark.dataXMaxGlobal
    
    # DEBUG CODE
    console.log JSON.stringify( @classification )


    window.classifier = @

    @recordedClickEvents = [] # array to store all click events

    # zoom levels [days]: 2x, 10x, 20x
    @zoomRange = 15
    @zoomRanges = []
