Easy AppleScript for having an icon repeatedly switching. Modified gif script by @ Cesar_Pasache
Add script to AppleScript widget
Assign icons and set icon to change on regex=1
Set repeat to desired repeat delay (too low will cause increased energy usage)
tell application "BetterTouchTool"
try
set frame to ((get_number_variable "frame") as integer)
on error
set frame to 0
end try
if frame is 0 then
set frame to 1
else if frame is 1 then
set frame to 0
end if
set_persistent_number_variable "frame" to frame
return frame
end tell