Detect if analog voltage input drops for duration of time

Hi all
My script currently outputs HIGH/LOW to pin 13 when analog voltage input is above or below 5v

I’m trying to figure out how to only output low if voltage input drops below 5v for 5 seconds

Here’s what I currently have

/*

int analogInput = 1;
float vout = 0.0;
float vin = 0.0;
float R1 = 10000.0; // resistance of R1 (100K)
float R2 = 1000.0; // resistance of R2 (10K) 
int value = 0;
unsigned long time;

void setup() {
  //start serial connection
  Serial.begin(9600);
  analogReference(INTERNAL);
  pinMode(13, OUTPUT);
  delay(500);

}
void loop(){

  
   // read the value at analog input
   value = analogRead(analogInput);
   vout = (value * 1.1) / 1024.0; 
   vin = vout / (R2/(R1+R2)); 
   if (vin<0.09) {
   vin=0.0;//statement to quash undesired reading 
} 

if (vin>5) {
    digitalWrite(13, HIGH);
  } else {
    
    digitalWrite(13, LOW);
  }
   
  Serial.println(vin);

}

Thanks in advance

The simplest way is to think of the problem upside down. Record the time whenever the value is HIGH and then check how long since it was last HIGH - like this

if (value == HIGH) {
   timeValueLastHigh = millis();
}

if (millis() - timeValueLastHigh >= 5000) {
   // value has been low for 5 secs
   // do stuff
}

...R

Robin2:
The simplest way is to think of the problem upside down. Record the time whenever the value is HIGH and then check how long since it was last HIGH - like this

if (value == HIGH) {

timeValueLastHigh = millis();
}

if (millis() - timeValueLastHigh >= 5000) {
  // value has been low for 5 secs
  // do stuff
}




...R

Brilliant! I knew it would be simple. Works perfectly, thanks