Lua How to set my raids?

[therrax]

I am using this script: http://otland.net/threads/tm-boss-raid-system-v1-3-0-release-updated.86641/
I have TFS 0.4
I can set it like this:

    <globalevent name="thehornedfox" interval="7200000" event="script" value="raids/thehornedfox.lua"/>
    <globalevent name="register_thehornedfox" type="start" event="script" value="raids/thehornedfox.lua"/>

But I would like that all the raids were random, not repeated at any time. How to do this?
Thanks
For example:
Every day are 5 random raids, but not same.

 

[DanJ93]

if math.random(1, 100) <= 20 then
...script...
end

<globalevent name="thehornedfox" interval="7200000" event="script" value="raids/thehornedfox.lua"/>

every 2 hours u have 20% chance to start this raid.

 

[BeniS]

Well if you use my raid system it will only execute that script that has a chance to summon the boss.

 

[therrax]

Ok. thanks

 

[BeniS]

which is what you want...