Two diamond shapes, simple created with a single DIV tag and CSS properties.
Code:
<style type="text/css">
#diamond {
 width: 0;
 height: 0;
 border: 50px solid transparent;
 border-bottom: 20px solid #05ed08;
 position: relative;
 top: -50px;
}
#diamond:after {
 content: "";
 position: absolute;
 left: -50px;
 top: 20px;
 width: 0;
 height: 0;
 border: 50px solid transparent;
 border-top: 70px solid #05ed08;
}
</style>

<div id="diamond"></div>
Demo:
Diamond shield

Diamond 2

Code:
<style type="text/css">
#diamond {
 border-style: solid;
 border-color: transparent transparent #0809fe transparent;
 border-width: 0 25px 25px 25px;
 height: 0;
 width: 50px;
 position: relative;
 margin: 10px 0;
}
#diamond:after {
 content: "";
 position: absolute;
 top: 25px;
 left: -25px;
 width: 0;
 height: 0;
 border-style: solid;
 border-color: #0809fe transparent transparent transparent;
 border-width: 70px 50px 0 50px;
}
</style>

<div id="diamond"></div>
Demo:

Daily Test with Code Example

HTML
CSS
JavaScript
PHP-MySQL
Which attribute is used in <a> tag for the address of the link?
src href rel
<a href="http://coursesweb.net/" title="CoursesWeb.net">CoursesWeb.net</a>
Which CSS property sets the type of the text font?
font-family text-decoration font-size
h2 {
  font-family:"Calibri",sans-serif;
}
What instruction selects all the <div> tags with class="cls"?
querySelector("div.cls") getElementsByTagName("div") querySelectorAll("div.cls")
var elm_list = document.querySelectorAll("div.cls");
var nr_elms = elm_list.length;       // number of selected items
alert(nr_elms);
Indicate the function that can be used to get the sum of values in an array.
array_sum() array_diff() array_shift()
$arr = array(1, 2, 3, 4);
$arr_sum = array_sum($arr);
echo $arr_sum;       // 10
Diamond shape with CSS

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