18. Link
<a href="url">link text</a>
<a href="https://www.google.com">Google</a>
Jump to :
<a href="#id">link text</a>
<div id="id">Content</div>
<a href="https://www.google.com" target="_blank">Google</a>
19. Images
<img src="img/rubikal.png" /> <img src="rubikal.png" alt="Rubikal" />
If a browser cannot find an image, it will display
the alternate text:
30. Padding
padding : 50px;
( top right bottom left )
padding : 50px 10px;
( top bottom left right)
padding : 50px 10px;
( top bottom left right)
padding : 50px 10px 0px;
( top left right bottom)