1 : First install the Blink Plugin (see Help page 1)
2 : Be sure Blink plugin is enabled in your Extension manager.
3 : First add Custom HTML Module
4 : select a visible module position.
5 : Then toggle Editor, and paste the blink plugin code.
6 : Then turn ON Prepare Content in the options.
7 : Then it should work in a Custom HTML Module
8 : Please, don't forget to donate me