Hello Digital Timer

#include <LiquidCrystal.h>
LiquidCrystal lcd1(13, 12, 11, 10, 9, 8);
LiquidCrystal lcd2(7, 6, 5, 4, 3, 2);
int push_button = A0; // select the input pin for switch
int minutes;
int seconds;
int updated_minutes;
int updated_seconds;
int button = 0; // variable to store the value coming from the sensor
int timer_time;
int duration;
void setup()
{
Serial.begin(9600);  
lcd1.begin(16, 2);
lcd2.begin(16, 2);
pinMode(A3, OUTPUT);
pinMode(A4, OUTPUT);  
pinMode(push_button, INPUT);
pinMode(A1, INPUT); 
pinMode(A2, INPUT);  
}

void loop()
{ 
digitalWrite(A3,LOW);
digitalWrite(A4,LOW);  
button = digitalRead(push_button);
timer_time = analogRead(A1); 
timer_time = timer_time/20;  
duration = analogRead(A2);
duration = duration/20;  
Serial.print("Timer time = ");
Serial.println(timer_time); 
Serial.print("Duration = ");
Serial.println(duration);  
lcd2.setCursor(0,0);
lcd2.print("Timer Time ");
lcd2.setCursor(13,0);
lcd2.print(timer_time);  
lcd2.setCursor(0,1);
lcd2.print("Duration ");
lcd2.setCursor(13,1);
lcd2.print(duration); 
delay(400);
lcd2.clear();  
  if(button == HIGH )
  {
    digitalWrite(A4, HIGH); 
  for(minutes=0;minutes<timer_time;minutes++)
  {
    lcd1.setCursor(0,0);
    lcd1.print("My Timer:-   ");
    lcd1.setCursor(11,0);
    lcd1.print(minutes);
    lcd1.print(":");
    for(seconds=0;seconds<=59;seconds++)
    {
    lcd1.setCursor(13,0);
    lcd1.print(seconds);
    delay(1000);
    
    }
    lcd1.setCursor(11,0);
    updated_minutes = minutes+1;
    lcd1.print( updated_minutes);
    lcd1.print(":");
    updated_seconds = seconds-59;
    lcd1.setCursor(13,0);
    lcd1.print(updated_seconds);
   digitalWrite(A3, LOW); 
   digitalWrite(A4, HIGH);
   lcd1.clear();
  }
  for(seconds=duration;seconds>=0;seconds=seconds-1)
  {
    lcd1.setCursor(0,0);
    lcd1.print("Duration:    ");

   lcd1.setCursor(11,0);
   lcd1.print(seconds);
    digitalWrite(A3, HIGH);
    digitalWrite(A4, LOW);
 
   delay(1000);
     
  }
}
else 
{
digitalWrite(A3, LOW);  
}
}