toggle App On&Off.applescript

use AppleScript version "2.4" -- Yosemite (10.10) or later
use scripting additions

-- http://veritrope.com/code/toggle-an-app-on-off
--ENTER THE NAME OF THE APP 
--THAT YOU WOULD LIKE TO TOGGLE
--IN THE PROPERTY BELOW...

--property app_Name : ""
--
--
--if appIsRunning(app_Name) then
--	do shell script "killall " & (quoted form of app_Name)
--else
--	do shell script "open -a " & (quoted form of app_Name)
--end if
--
--on appIsRunning(appName)
--	tell application "System Events" to (name of processes) contains appName
--end appIsRunning

tell application "System Events"
	set frontProcess to first process whose frontmost is true
	set visible of frontProcess to false
end tell