ASCII
DISCO
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  o   \ o /  _ o        __|    \ /     |__         o _ 
 /|\    |     /\   __\o   \o    |    o/     o/__   /\  
 / \   / \   | \  /) |    ( \  /o\  / )    |   (\  / | 
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Continuous, infinite scrolling with wrap-around in HTML/CSS/JS
Python's missing runtime type checker