How do I lock the values (with a button) 10 seconds before in a loop?

Projects Programming
3

Hello, may ask what is the !digitalRead code?

Also, I would like to take this opportunity in uploading the whole code to fully understand it:



#include <Wire.h>                  
#include <LiquidCrystal_I2C.h>      //Arduino IC2 Library
LiquidCrystal_I2C lcd(0x27, 16, 2); 

int sensorPin = A3;
int sensorVal = 0;
float sensorCalc51 = 0; //51%
int redPin = 11;
int greenPin = 10;
int bluePin = 9;
int buzzPin = 13;     //Setting pins
int i; //loop



void setup()
{
  pinMode(sensorPin,INPUT);
  pinMode(redPin,OUTPUT);
  pinMode(bluePin,OUTPUT);
  pinMode(greenPin,OUTPUT);
  pinMode(buzzPin,OUTPUT);

  lcd.begin();
  lcd.backlight();        //LCD setup
  Serial.begin(9600);
}

void loop()
{
       
        sensorVal=analogRead(sensorPin);    
        sensorCalc51=(341./184.)*sensorVal;
        Serial.println("   ");
        Serial.print("0% :    ");
        Serial.print(sensorVal);        //prints the 0%
        Serial.print("  51% :   ");
        Serial.print(sensorCalc51);      //prints 51%
        delay(100);
               

 if (sensorVal <= sensorCalc51) {   //If value is goes between the given threshold, the LCD will print a text,GREEN pin, and buzzer will TURN OFF               
            lcd.clear();
              lcd.clear();
              lcd.print("YOU ARE TOO ");
              lcd.print(sensorVal);
              lcd.setCursor (3,1); 
              lcd.print("SOBER");
          analogWrite(redPin, 000);
          analogWrite(bluePin,000);
          analogWrite(greenPin,255);
          digitalWrite(buzzPin, LOW);               
               
          }
        
            if (sensorVal >= sensorCalc51) {  //If value is goes above the threshold, the LCD will print a text,RED pin, and buzzer will TURN ON
               lcd.clear();          
              for (int i=0; i<=20; i=i+1) {
               
              lcd.print("DRUNK DRIVER");
              lcd.setCursor (8,1);
              lcd.print("ON-BOARD");
              
            analogWrite(redPin,255);
            analogWrite(bluePin,000);
            analogWrite(greenPin,000);
            digitalWrite(buzzPin, HIGH); 
            delay (500);
            digitalWrite(buzzPin, LOW);
            delay (500);
               }
            }
  
} //end of loop