Toggle visibility of hidden files and folders in Mac OS X

Toggle Hidden File Visibility

# Toggle Hidden File Visibility Automator Service
# 1. Create a new Automator service
# 2. Service receives no input in Finder
# 3. Add an Automator Ask For Confirmation action
# 4. Automator Run Shell Script action with below shell script
#    Set the Shell to bin/sh/

is_shown=$(defaults read com.apple.finder AppleShowAllFiles)
if [ $is_shown = "FALSE" ]
then
  defaults write com.apple.finder AppleShowAllFiles TRUE
  killall Finder
else
  defaults write com.apple.finder AppleShowAllFiles FALSE
  killall Finder
fi

Hi, thanks for script, but it doesn't work on OS X 10.8.4 and shows error: "-: -c: line 4: syntax error near unexpected token 'else' ". When I checked manual for UNIX & Linux Shell Scripting (If & Else), I found that correct is
if [ $is_shown = "FALSE" ]; (added semicolon) and it works fine now.

Works perfectly in OS X 10.9.2, thank you!

Works in Yosemite. Special thanks @iCoderman