What stages do you need to go through to develop a program?

In order to develop a program, you must go through the following stages. Learn some programming language. Draw up a detailed block diagram of the program. Then work out separately, each element of the block diagram. Then combine all the elements of the program into a single whole. As a rule, on the first try, it does not work. It turns out after the n – th attempt. After the program has started working, you need to find (glitches), program crashes. After they are found, the program is conditionally considered ready.