Turning off Math.random() after one use?

Hi, I currently have a 5 product banner with a randomizer and next/previous buttons. When it launches, it loads one of those frames using the Math.random() command. However, it does it again when either of the next & previous buttons are clicked. Is there any way for me to turn that off after it's been executed once at launch?

For example:

• HTML randomly loads a frame from 1 to 5 (E.g. Frame 3).
  I'd like the next button to continue in sequential order from there: 3, 4, 5, 1, 2, 3

• HTML randomly loads Frame 4.
  The next button continues sequetionally when clicked: 4,5,1,2,3,4

Here's what I have in Frame 0:

var nextFrame = 1;
var totalFrames = 5;
var randomFrame = Math.random()*5;
var lastPicked = randomFrame - 1;

this.next.addEventListener("click", fl_ClickToGoToAndStopAtFrame.bind(this));

function fl_ClickToGoToAndStopAtFrame()
{
	nextFrame++;
	if (nextFrame > totalFrames) {
	nextFrame = 1;
}
	this.gotoAndStop(nextFrame);
}

this.previous.addEventListener("click", fl_ClickToGoToAndStopAtFrame.bind(this));

function fl_ClickToGoToAndStopAtFrame()
{
	nextFrame--;
	
	if(nextFrame < 1) {
	nextFrame = totalFrames;
}
	this.gotoAndStop(nextFrame);
}

this.gotoAndPlay(randomFrame);
{
	if (randomFrame == currentFrame){
		randomFrame = lastPicked;
	}
}

And on Frame 1 (the first product), I have this:

this.stop();

/* Product 1 Link */

this.product1_cta.addEventListener("click", fl_ClickToGoToWebPage);

function fl_ClickToGoToWebPage() {
	window.open("https://www.google.com", "_blank");
	
	if(!this.started) {
		this.product1_cta.addEventListener("click", fl_ClickToGoToWebPage);
		this.started = true;
	}
}

I'm still learning, so sorry if this isn't right. I'm using the code snippet and action wizard to adjust as I need to.

Thank you!