<span>A short musical idea associated with a person, object, or thought, used by Richard Wagner in his operas, is called leitmotif.
It is a musical phrase that is usually very short, and appears constantly throughout an opera or something else each time a person associated with it appears on the scene. Richard Wagner used leitmotifs quite often, and they can especially be found in his Der Ring des Nibelungen. 
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Answer:
don' t draw this window.
Explanation:
If you really have that kind of questions, you shouldn' t draw at all.
Try and figure out it in your own. Sketch a lot of images you see through real windows and sometime you' ll find out!