Creating macro for shadowing

Hi guys !

I’m currently creating this post because I wanna create a macro for me to do some shadowing exercise for English and Japanese. And I have to take some small audio sentence , add few seconds of silence behind (like 7 milliseconds) and after that repeat it seven times for each sentence. I’m doing it for approximately 10 to 20 sentence so This is why I would create macro.

I try to research and do find myself but it cost me an arm and a leg to achieve it so I’m searching here some help for creating this macro. I’m posting here an image of what my audacity what I want it look after the macro .

Take a look at this post and see if it helps you any.