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<html><head><meta name="viewport" content="width=device-width, initial-scale=1"><style>.square { height: 50px; width: 50px; background-color: #555;}</style></head><body><h2>Square CSS</h2><div class="square"></div></body><!-- Mirrored from www.w3schools.com/howto/tryit.asp?filename=tryhow_css_shapes_square by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 05 Sep 2022 14:31:19 GMT --></html>