How to display hollow hourglass figure from pseudographics in bash?

Question

bash

Write a script that takes an odd integer N and displays
a figure (empty hourglass) made in pseudographics using N lines.
The number of characters in a line is equal to the line number. For N = 4:





I wrote a code that outputs a "filled" hourglass


code

, how to implement a program with an hourglass like in the photo?

Answer 1

google "shell escape sequences".
https://www.opennet.ru/base/dev/console_ctl.txt.html
https://habr.com/ru/post/325082/