if RFirst then
  RFirst = 1;
 else
  RFirst = 2;
end
if RFirst == 2 then
  RCount = 1;
end
if RFirst == 1 then
  RCount = RCount+1;
end
if RCount > 2 then
  RCount = 1
end

switch RCount
 case 1
  service.setTTSVolume(0.1)
  service.setAsyncTTSVolume(0.1)
service.playSoundTick()
  case 2
  service.setTTSVolume(80.1)
  service.setAsyncTTSVolume(80.1)
  service.speak("đã bật giọng nói")

end