Basic drawing of "blivet" or "poiuyt" impossible object. If the bottom section is covered up, then there are two bars with rectangular cross-section descending; while if the top section is covered up, there are three cylindrical rods ascending. If both the bottom and the top are covered, then there are only six evenly-spaced parallel lines...

For version with backgrounds to enhance the illusion, see File:Poiuyt--opaque.svg (or for a monochrome version, see File:Poiuyt-pseudo-backgrounds.svg ).

This is an elaborated version of the following basic SVG file:

<?xml version="1.0" standalone="no"?><svg xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink" stroke="#000000" stroke-width="8"
width="426" height="544"><g transform="translate(204,570)rotate(-60)scale(1
-1)"><g fill="#dddddd"><ellipse transform="translate(34,60)rotate(66.219865)"
id="End" rx="21.28008" ry="11.3"/><use y="80" xlink:href="#End"/><use y="160"
xlink:href="#End"/><path d="M440,200V120H420V160"/></g><path fill="none"
d="M40,240H500V80L480,40H28M28,200H440V120H28 M440,200L420,160V120M500,80H40
M420,160H40"/></g></svg>