sed with several lines, how?

[Arthur Bela]

thank you, and sorry, if i had formulated wrong, but the "SOMETEXT#X"
is a random STRING, like:

$ cat testfile.txt
alsjflsajfkljasdf
<br><font size=3>asfklasjlkyxcvo</font><br>
<br><font size=3>kldfjlkasjdfasdf</font><br>
kasfjxcvklajdflas

yxcvkjasafjads
<br><font size=3>asdfjkldjlasj</font><br>
</font></div></body></html>
uiyxzckjhasfsd
$



$ awk 'BEGIN {sawpattern=0} "^SOMETEXT, ^SOMETEXT" {if (($0
~/<br><font size=3>SOMETEXT/ ) && (sawpattern == 0)) {sawpattern=1}
else {sawpattern=0;print $0}}' testfile.txt
alsjflsajfkljasdf
<br><font size=3>asfklasjlkyxcvo</font><br>
<br><font size=3>kldfjlkasjdfasdf</font><br>
kasfjxcvklajdflas

yxcvkjasafjads
<br><font size=3>asdfjkldjlasj</font><br>
</font></div></body></html>
uiyxzckjhasfsd
$

On 27 November 2010 12:39, Arthur Bela <jozsi.avadkan at gmail.com> wrote:
> hyphen's [ - ] are just for marking the start/end of a pattern, but
> there are _not in_ the pattern!
> "OUTPUT" is what i want after "seding" the PATTERN#X's
>
>
> so i for e.g.: need the first, and second "magic"
> sed "FIRSTMAGIC" PATTERN#1
> sed "SECONDMAGIC" PATTERN#2
>
>
>
>
> PATTERN#1:
>
> -----------------------------------
> SOMETEXT#1
> <br><font size=3>SOMETEXT#2</font><br>
> <br><font size=3>SOMETEXT#3</font><br>
> SOMETEXT#4
> -----------------------------------
>
> "exact pattern", what is unique from the pattern:
> -----------------------------------
> </font><br>\n<br><font size=3>
> -----------------------------------
>
> OUTPUT:
> -----------------------------------
> SOMETEXT#1
> <br><font size=3>SOMETEXT#3</font><br>
> SOMETEXT#4
> -----------------------------------
>
>
>
>
>
> and:
>
> PATTERN#2:
>
> -----------------------------------
> SOMETEXT#1
> <br><font size=3>SOMETEXT#2</font><br>
> </font></div></body></html>
> SOMETEXT#3
> -----------------------------------
>
> "exact pattern", what is unique from the pattern:
> -----------------------------------
> </font><br>\n</font></div></body></html>
> -----------------------------------
>
> OUTPUT:
> -----------------------------------
> SOMETEXT#1
> </font></div></body></html>
> SOMETEXT#3
> -----------------------------------
>
>
> i just can't figure it out, how to "sed" when having several lines
> [nor in awk, perl..]
>
> could anyone post a link, or some guide, how to write these two lines of "sed"?
>
> Thank You! :\
>