void not working

#include <LiquidCrystal.h>
LiquidCrystal lcd(12,11,5,4,3,2);

const int infoled = 6;
const int output = 8;

int buzzer =5;
int buzzerar = 5;

int seconds = 0;
int minutes = 0;
int memseconds = 0;
int memminutes = 0;
int endless = 0;
int buzzeraanuit = 0;
long previousMillis = 0;
long interval = 1000;
int a =30;
int b =31;
int c =32;
int d =33;
void setup () {
    pinMode(a,INPUT);

    pinMode(b, INPUT);


    pinMode(c, INPUT);
    
    pinMode(d, INPUT);
    
    //pinMode(infoled, OUTPUT);
    //pinMode(output, OUTPUT);

    lcd.begin(16,2);

    lcd.setCursor(0,0);
    lcd.print("UFC KALTIM 2");
    lcd.setCursor(0,1);
    lcd.print ("AUTOMATIC PURGE");
    delay(2000);
    lcd.clear();
}
    
    void delaySet()
    {
      while(1) 
      {
        lcd.setCursor(0,0);
        lcd.print("Set time");
        lcd.setCursor(0,1);
        if(minutes<10) 
        {
          lcd.print("0");
          lcd.print(minutes);
        }
        else 
        {
          lcd.print(minutes);
        }
        lcd.print(":");
        if(seconds<10) 
        {
          lcd.print("0");
          lcd.print(seconds);
        }
        else 
        {
          lcd.print(seconds);
        }

        if(digitalRead(a)==HIGH) 
        {
          minutes++;
          delay(350);
        }

        if(digitalRead(b)==HIGH) 
        {
          seconds++;
          delay(350);
        }
        if(digitalRead(d)==HIGH) 
        {
          seconds = 0;
          minutes = 0;
        }
         if(digitalRead(c)==HIGH) {
          lcd.clear();
          lcd.setCursor(0,0);
          lcd.print("Time set");
          delay(1000);
          loopMode();
        }
      }
    }
    void LoopMode() 
    {
      if(endless<1) {
        lcd.clear();
        delay(500);
        while(1) {
          lcd.setCursor(0,0);
          lcd.print("Loop mode?");
          if(digitalRead(c)== HIGH) {
            memseconds = seconds - 0;
            memminutes = minutes - 0;
            endless++;
            lcd.clear();
            lcd.setCursor(0,0);
            lcd.print("Loop mode aan");
            delay(1000);
            startcountDown();
            }
           if(digitalRead(A3)== LOW) {
            endless=0;
            lcd.clear();
            lcd.setCursor(0,0);
            lcd.print("Loop mode uit");
            delay(1000);
            startcountDown();
            }
           }
          }
          else {
            startcountDown();
          }
        }

why my loopmode() wasn't declared in this scope??
help guys

Check your spelling

LoopMode is not the same as loopMode.

I'm glad you used code tags but I guess you stopped reading my reply on your other thread before you saw the part about Auto Format. Show some consideration for the people who are trying to help you and some pride in your work. Your code looks sloppy and is hard to read with your current random indentation and pointless blank lines.

And, PLEASE stop call them "voids". They are functions! The keyword "void" simply means that particular function does not return a value.