You have a few options:
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This does most of the heavy lifting for you if you set it up. You can assign virtual switches to run scenarios, and a scenario can control any number of switches, routines, SHM and pretty much anything on ST.
[BETA] GOOGLE HOME HELPER-From the author of Ask Alexa -
Create a virtual switch, and then use CoRE to create a piston that does once again anything that you can possibly think of in SmartThings
[RELEASE CANDIDATE] CoRE (Community's own Rule Engine) -
Create a virtual switch, then use the Smart Lighting app to trigger scenarios/lighting based on the switch state.