How to have no delay in program.

Projects Programming
3

Something like this, but what do I put in the dalay (xxxxxx)?

const int ledPin = 3;
int sound = A0;
int threshold = 400;
int sensorValue = 0; 

int ledState = LOW;          
long previousMillis = 0;  
long interval = 1000;


void setup() 
{
    Serial.begin(9600);
    pinMode(ledPin, OUTPUT);
}
 
void loop() 
{
        int sensorValue = analogRead(sound);
	Serial.print("sensorValue ");
        Serial.println(sensorValue);
        
  if(sensorValue > threshold)
	{
           digitalWrite(ledPin, HIGH);
           delay(100);
		
	}
{
           digitalWrite(ledPin, LOW);
            delay(10);
        }       
 unsigned long currentMillis = millis();
 
  if(currentMillis - previousMillis > interval) {
    
    previousMillis = currentMillis;  
  }
    if (ledState == LOW)
      ledState = HIGH;
    else
      ledState = LOW;
    digitalWrite(ledPin, ledState);
}