How do I create a Marquee or writing work?

the following script:

1. right to left
  " <marquee direction="left" scrollamount="2" align="center"> Posts Walk </ marquee> "

<marquee direction="left" scrollamount="2" align="center"> Posts Walk </ marquee>

2. left to right
  " <marquee direction="right" scrollamount="2" align="center"> Posts Walk </ marquee> "


<marquee direction="right" scrollamount="2" align="center"> Posts Walk </ marquee>

  3. back and forth
 
  "<marquee direction="left" scrollamount="2" align="center" behavior="alternate"> Posts Walk </ marquee>"



<marquee direction="left" scrollamount="2" align="center" behavior="alternate"> Posts Walk </ marquee>

 4. top to bottom
" <marquee direction="down" scrollamount="2" align="center"> Posts Walk </ marquee> "


<marquee direction="down" scrollamount="2" align="center"> Posts Walk </ marquee>

easy not ...