Trying to do a simple effect...need advice

First, I’m fairly new with programming… That being said, I needed to apply an effect on the intensity value of a par can. It needed to start at 20%, fade up to 80%, HOLD for 5 seconds, fade down to 20%, HOLD for 5 seconds, and repeat.

My first thought was to apply a sine effect to the intensity. I brought the channel up, applied the effect and its values, however, I was having a problem getting the top/bottom levels to hold for the 5 seconds.

My next thought was to skip the sine effect, and record it to a cue.

Cue 1: 20%
Cue 2: 80%
Cue 2: 20%

And play around with timing…but obviously I was asked on the spot and didn’t have the time to keep playing around. Just curious to get some advice on how to accomplish this...