Go in the code and look at the explanations. You also have to create a list by going to variables btw if u didn't know. You can also put this behind a code system like if you press a certain key or a certain key and enter a code. You can also right click the terminal list and save it as .txt file by exporting.
This takes a few minutes to make and can be very useful. I just felt like making this for anyone who doesn't use ScratchAddons with debugger enabled or can't. I just hopped on Scratch and decided to make this simple project for people. I will make a more complicated version of this sometime.