drawing a line

From (x1, y1) to (x2, y2)
Fill does not apply to lines

@currankelleher's famous introToD3 examples
artisanally ported to blockbuilder.org by @micahstubbs

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>SVG Example</title>
  </head>
  <body>
​
    <svg width="250" height="250">
      <line x1="50" y1="50" x2="200" y2="150"
            stroke="black" stroke-width="20"></line>
    </svg>
​
  </body>
</html>
​
    