The document is a poem about a computer program written in code. It describes how the program was made out of codes, methods, commands, and variables. Each verse focuses on a different part of the program - codes, methods, commands, variables - and describes how they work together to create the overall program which runs in a terminal and can be tested to make it final.

1. Program! (tune = "Dreidel!")
I have a computer program.
I made it out of codes.
And when it is started,
Oh program, think of all the modes!
Oh code, code, code,
I made you out of a method.
And when you’re being written,
Code, you’re understood!
Oh method, method, method,
I made you out of commands.
And when you have an error,
I shall give you demands!
Oh command, command, command,
I mage you out of variables.
And when you are inputted,
I will make up symbols!
Oh program, program, program,
You are in the terminal.
And when you are tested,
I shall make it final!