Landolt-Sehtest
<html>
<iframe src=„https://trinket.io/embed/python/6b11573ba3“ width=„100%“ height=„600“ frameborder=„0“ marginwidth=„0“ marginheight=„0“ allowfullscreen></iframe>
</html>
<html>
<iframe src=„https://trinket.io/embed/python/6b11573ba3“ width=„100%“ height=„600“ frameborder=„0“ marginwidth=„0“ marginheight=„0“ allowfullscreen></iframe>
</html>