#redblock {
position: absolute;
top: 200px;
left: 200px;
color: white;
background-color: red;
width: 90px;
height: 90px;
padding: 5px;
}
#yellowblock {
positioning: absolute;
top: 20px;
left: 20px;
background-color: yellow;
color: red;
width: 50px;
height: 50px;
padding: 5px;
}
Absolute Positioning
the red block is positioned 200px from the top and 200px from the left,
The Yellow block inside is positioned 20 pixels from the
top of its parent element,and 20 pixels to the left.