I'm looking to create a very simplistic way to style the input of a textarea very similar to this box. I can click bold and then is entered into the textarea at the position of the cursor.

I have seen a lot of plugins out there that do this and that's fine but I'm looking for a very simple version with probable just bold and a

. Plus I want to do it myself. I'm like that. I can do everything except find the position in which the cursor sits to be able to dump in the relevant tags.Thanks in advance