The implementation of the part for watching events.
    	That's what the tutrial part seems to require.
    	Incidentally, I made it cover button events.
    	That might help the button usage that has been wondering.
    	
    	That's all for today.
    	I didn't test at all. I didn't run it even once.
    	I spare that task for tommorow.
    	Thanks to that I don't have to worry about what I should do tommorow. That's great!
    	
    	In other words I have no time thanks to my social status.
    	Working? How does that value?
    	That's the alternative expression for 'slavery'.
    	Our society has yet to be developed. For what? Don't ask me that.