Yes you do. Writing a computer program in a computer programming language by definition makes you a computer programmer. Modifying another application - making a "mod" - is a pretty advanced thing for a computer programmer to do. Forge, FML etc. take care of 99.9% of this, including the ASM, loading your mod and deobfuscating MC. Therefore what you are making isn't really a "mod" at all, its more of an add-on. There are other "mods" out there that allow you to write your add-on in another computer programming language. For example these "mods" allow you to write your "mod" in Skript, JavaScript, Scala, Kotlin or even whatever Scratch-based language MCreator uses. However, doing this is inherently writing "code" to make a computer do something, which makes you a computer programmer.
In future if you want help on this forum I would recommend being more polite. It may be hard for beginners who haven't done the appropriate pre-requisite background stuff (learning how to write code in the language you've decided to make your mod in, learning the basics of setting up gradle from the command line - or using the command line at all, learning the basics of git etc.), however beginners should have done their research and learned how to do these things.
Learning by example is great, and it's how I've learned 95% of everything programming related, but the key part of it is learning, not just copy pasting code. This is why posting ready-made code snippets is discouraged on these forums.
The question you asked was pretty simple and you got a quick answer. After that, you could have googled what a "counter" is in programming and how to make one that increments. The basic idea of it (in this scenario) is to have a variable (an instance field in this case) that you increment (pre-increment would be perfect for a tiny performance gain in this case) every "tick" (in your onUpdate method in your TileEntity in this case) and, if the value is the desired one, reset the variable and execute your logic that should only happen every several ticks.