Create a running and walking workout

Hi - I'm trying to figure out how to create a preset running/walking workout with set distances.

Example:

I want to start a workout and after I've run a specific distance I want the watch to automatically switch to walking for a specific distance.

It would work like this... 

Click start of workout, I run the set distance, the watch beeps and automatically switches me to walking tracking until I finish the specific walking distance.

Is this possible?  I've spent multiple days searching and have been able to figure out how to make it happen?

Thanks in advance!