General comments - minor fixes

[Nanoseb]

After a quick read here are things I see you can improve:

• You are using version control, so there is no need for a folder containing older version of your script, use git tags instead
• You should indent your code, it makes it way easier to read
• I am not sure I see the point of the 4s sleep but adding a non useful loading time
• You should put double quotes when ever you use a variable. Here, if you send a message like ; rm -rf /*, it is going to get executed at line 30 (and maybe 40 too).
• Use https://www.shellcheck.net/ to check for common mistakes

If you have more precise questions, feel free to ask them

[gitdev-bash]

• You are using version control, so there is no need for a folder containing older version of your script, use git tags instead

• You should indent your code, it makes it way easier to read

• I am not sure I see the point of the 4s sleep but adding a non useful loading time

• You should put double quotes when ever you use a variable. Here, if you send a message like ; rm -rf /*, it is going to get executed at line 30 (and maybe 40 too).

• Use https://www.shellcheck.net/ to check for common mistakes