Answer:
Hi, first of all have clarity what do you want to do with that script? e.g. (start a server, listen to other script, run a math calculation, start a video game, etc..)
after that, choose a programming language preferably of high level to make easy the execution.
Step-by-step explanation:
I'm going to make an example of a short script in python
# Python script.py
x = " "
while(x =! "stop"):
print("While x is different from stop, continuing input!")
x = input()
And then, in a promt or ide you run python script.py
I hope it's help you.