5 .container { color: red; width:
100px; height:
150px; position: relative;}
6 .container:first-line { font-size:
30px;}
7 div { background: white; }
8 .reference { position: absolute; width:
20px; height:
20px; background: black; }
10 .second { left:
40px; top:
20px; }
14 There should be no red visible below.
15 <div class=
"container">
16 <div class=
"reference first"></div>
17 <div class=
"reference second"></div>