Try reading this post on a smartphone...excessive scrolling.

The problem link and code is in Am_Fear_Liath_Mor's post. This extra long link and code snippet needs to be shortened... I reported the post so that a MOD can fix it.
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock