Creating varying intervals and repeats in custom workouts mode

I have workouts I do for example (4x(4x1x1@FTP, 5’ @85%, 2’ recovery, 3x1x1@120% FTP) and right now if i build a custom workout I have to manually add each of them in individually 4x’s even though it’s repetitive interval work. Would like a feature (garmin does this with their workouts) where you can build something like this or a “repeat” function