Delay in a timer

I'm trying to set up a timer that adds a delay into the timer allowing 2 commands to be executed. The full length of the timer would be about 60 seconds. The timer would fire 'prepare rejuvenate'; -wait 20 seconds-;'cast rejuvenate' which would last about 40 seconds, then it would refire the timer. making a loop of the command over and over and over until I disable the timer. Any suggestions? I'm new to this.

Make a timer that ticks every minute. In it, put the following code (use Send to Script with Lua language):

Also see: See: http://www.gammon.com.au/faq point 25.