Animate finding the middle
V, 10 bytes

ò^llYpr $x


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Explanation:

ò^ll         " While there are at least two non-whitespace characters on the current line
    Y        " Yank this line
     p       " Paste it below
      r      " Replace the first character with a space
        $    " Move to the end of the line
         x   " Delete a character