You'll want to use the help file and look at some basic scripts.

The main thing you'll want to look at is: /help on text

Here's just a very basic example:

Code:
on *:text:!command:#channel: {
  msg $chan Some message.
}


In this example, you'd replace !command with the command you want to use. You can use wildcards if needed, for example !command*, and you can use multiple words. You'd replace #channel with your channel name, or you can just leave it as # if you want it to work for all channels. You'd also replace Some message with what you want sent to the channel. If you want it sent to the person who used the command instead of the channel, you can replace $chan with $nick.

Some other useful help topics:
/help on input
/help on notice
/help /var
/help /set
/help if then else <-- I think that will bring it up, otherwise look up /help elseif

Just one other example, showing another way to do the same thing, which in some cases works better.

Code:
on *:text:*:#channel: {
  if ($1 == !command) {
    msg $chan Some message
  }
}


Note that the trigger is no longer on the first line. Instead, we just use a wildcard so the even triggers on all text. Then, we use IF statements to check if the command is used ($1 is the first word, $2 is the second, etc. and == check that the first word is !command). You can also use $1- to compare all words (in this example, that would make this only work if only !command is used and not something like !command this). There are many other things you can do and the best thing is to just try things out and refer to the help file.

NOTE: Try it out yourself first. Then, if you have questions or it's not working the way you expect, come here and ask for help. Give what you've tried and what you want it to do and we can help out. Also, note that on TEXT events do *not* respond if you type something from the same client as the script. It will only respond to other people (or another client on your computer) typing something. Use on INPUT if you want it to respond to you. If you want it to respond to both you and others, you'll need to use both events even if that means some duplicate code.

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