In time, you'll learn that the Goto command is counter-indicated in almost all of the programming languages existing, because it breaks the flow of your program. In TI-BASIC thought there is a lack of essential alternatives (like subroutines), so you can't really avoid it.

However, your case is one in which you can use a more efficient structure, which is the While loop. It will make your code a bit faster and you can program an exit condition if you need to.

I'm going to give you an exit condition to try out. How would you change your code to exit the strobe by clicking Enter?

To do this you'll want to know how the While condition works (why While 1 loops infinitely) and how to read keystrokes. After that it should be fairly easy to pull it off.

Good luck

Regarding strobe lights, just be careful with epilleptic people.