How to connect html code editor to the module?

Question

Joomla

Good day to all!
Tell me please ... I wrote a module for joomla, but I need to display a column with an html code editor in the module control! using textarea it doesn’t work, just a column appears where you can write, but I need it to be able to process the code and display the already processed code on the display (on the site) Thank you all in advance!