Forums Scripts & Popups Adding to perform // Message chans every 15 mins?

hey, im new to doing these mirc scripts, and have had a go at modyfying a bot. ive managed to get it to idle in ppls channels on !idle #mychan.

Now i was wondering if theres anyway way i can add to that bit of code, so it adds that channel to the perform list. So it will always join it, without users having to do the command over and over.

I was also interested in finding out if you can message all the channels your in with the same message, say every 15 mins.

Hope someone can help :0

thanks