Light flashing

Hi, i try to do a short period of light flashing on my Mi bulb. Why there is nothing happen?

capture

Please dont post pictures of text. Post the correctly formatted text.

From the documents:

Most lights do not support all attributes. You can check the integration documentation of your particular light for hints, but in general, you will have to try things out and see what works.

Your light probably does not support it. What sort of light is it?

Hi, I am using Mi Jia LED smart bulb.