Workout Wednesday-New Triathlon Workout

I am always looking for creative ways to mix up my workout routine.  About a year ago, I did a triathlon workout in which I completed a triathlon over the course of 6 or 7 days.  This workout was based on completing a specified distance of biking, walking, and swimming and recording the time it took to complete.  Now I am thinking about attempting a triathlon with a different approach. This time I am going to workout for a designated time frame and record the distance. The catch with this challenge is to conduct all three events in one workout.  I am thinking about starting with 20 minutes for each event and working my way up to 30 minutes for each event.  I like the idea of working my way up to a 1.5 hour workout.  It will be fun to record my distance with each workout and set new goal for improvement.  Not sure when I am going to attempt this workout, but  I will be sure to log my progress here on my blog.