I am a newbie too but trying my best to contribute, so feel free to improvise as you see fit.
I believe there are 3 ways to do that. If my post is overwhelming, just go with method 1.
Method 1: SmartApps - SmartApps is how most of the automation is done. In Wink language, Robots (+ Complete Customization) = SmartApps.
Go to Automation Tab - >SmartApps-> Smart Lighting (If you do not yet have this in the list, check in Add a SmartApp at the bottom - >New Lighting Automation - > Select Deck Lights - > In Select Trigger Choose SWITCH -> In Which Switch Choose Flood Light - > Done
Method 2: Routines - Create one routine for on and another for off.
Routine 1: Dog Out
Go to Automation Tab - > Routines - > Add a Routine - > Give a name (say Dog out) -> Select lights to group for turning on (here deck and flood lights) - > Done
Routine 2: Dog in
Go to Automation Tab - > Routines - > Add a Routine - > Give a name (say Dog in) -> Select lights to group for turning off(here deck and flood lights) - > Done
Method 3: Virtual Switch - This is similar to grouping from my experience but I would not look at this method until you are familiar with SmartThings platform.
See the second post here for more information - > FAQ: Creating a virtual Device
How I know the above? - Because I moved from Wink to SmartThings about 6 months back.