Problem with BB Code...

If any tag is not closed it is showing the tag.
If I opens a color code if created a color code without creating the previous one is not working.
Eg:
[color=red] hi...
[color=green] welcome
It will show as it is...
In discuz i have used to type as mentioned above...
Do you have any solution...?
Is it possible to make new BB code...?

?

I don't quite understand... if you properly open and close the bbcode you can have one color inside another one.

like this:
testing this should be red testing

here is the code I use:

Code:

[color=green][b]testing [color=red]this should be red[/color] testing[/b][/color]

Yes, you are required to add a 'ending' tag, as some call it, at the end.
e.g:

Code:

[color=red]This is where you put your text.[/color]

I just decided to give a bit more information a code with only one color, so that you will be able to distinguish exactly how to add the tags.