This is the Hello Creeping line Module based on the tutorial "From Beginner to Advanced in OpenCart: Module Development", adapted for OpenCart 2
See the original post with instructions here: http://code.tutsplus.com/tutorials/from-beginner-to-advanced-in-opencart-module-development--cms-21873 and here: https://academia-web.ru/pishem-modul-opencart-beguschaja-stroka http://academia-web.ru/beguschaja-stroka-v-opencart