[ we don't think about the language barrier they would encounter here it's fine ]

To do that, you just leave a longer gap when the letter ends. So, kind of like this.

[ he writes his name in morse code! three letters are easy enough to take in, and sure enough - there is a slightly longer gap between where each letter should end. ]

It's a little hard to portray on paper, but yeah. That's why I said you have to know what to listen for.