UNIX for Dummies Questions & Answers

Hello,
I am running a program in a terminal.
this program is just printing random words.
I can change the color of each word by entering the first character of the color(for example G for Green).
I want to write a bash code that runs in a different terminal and sends different characters to terminal 1 (the one showing the rectangle) to change the color automatically and constantly.

my word program is running in /dev/pts/1

i tried to do the following:

echo G > /dev/pts/1 , all it does is printing G in terminal 1. nothing happens to the color. how can I make it execute and change the color of the words?

The terminal doesn't change color unless you tell it to. If you want to print color codes, you'll have to put ASCII escape sequences for colors into your strings. You can find many examples for changing the color of your prompt which should help.

lets say its not about changing colors and its something else.
my question is how I make sure terminal 1 evaluates what terminal 2 sends to it as a command.

Terminals don't evaluate anything as commands.

Problem: When writing to the terminal, it goes to the screen. When reading from the terminal, it comes from the keyboard. That's just how it works.

To give arbitrary input to a terminal, you have to arrange to have the program run inside a virtual terminal you control. That's one thing the expect language can arrange for you...