How to Jump from one loop to another while executing

For my program I have to sense 3 inputs (A1, A2 and A3 in Arduino). If any one or two or more signals become zero (low), it goes in different case as per below program.

However, I want to reset the Arduino when all signals become high again. Therefore I have to again write another program loop2().

So how can I exit from one loop and get into another loop. If I have to use goto, please tell me how to use it?

The Arduino program given below.

const int analogPin1 = A1;
const int analogPin2 = A2;
const int analogPin3 = A3;
const int ledPin = 13;
const int ledPin2 = 7;      
const int  thresold = 400; 
unsigned int x1,x2,x3,fault = 0;

void setup()
{
    pinMode(ledPin, OUTPUT);
    Serial.begin(9600);
}

void Config()
{
    delay(1000);
    Serial.print("ATE0r");
    Response();
    Serial.print("ATr");
    Response();
    Serial.print("AT+CMGF=1r");
    Response();
    Serial.print("AT+CNMI=1,2,0,0,0r");
    Response();
}

void Response()
{
    int count = 0;
    Serial.println();
    while(1)
    {
        if(Serial.available())
        {
            char data =Serial.read();
            if(data == 'K'){Serial.println("OK");break;}
            if(data == 'R'){Serial.println("GSM Not Working");break;}
        }
        count++;
        delay(10);
        if(count == 1000){Serial.println("GSM not Found");break;}

    }
}

void loop()
{
    int analogValue1 = analogRead(analogPin1);
    int analogValue2 = analogRead(analogPin2);
    int analogValue3 = analogRead(analogPin3);



    if (analogValue1 < thresold) 
    { x1=1;
        fault=x1;
    }
    if (analogValue2 < thresold)
    {  x2=x1+3;
        fault=x2;
    }
    if (analogValue3 < thresold)
    {  x3=x1+x2+5;
        fault=x3;
    }

    switch(fault)
    {
    case 1:

        digitalWrite(ledPin, HIGH);         
        Serial.print("AT+CMGF=1\r");    
        delay(1000);
        Serial.print("AT+CMGS=\"+919512700997\"\r");    
        delay(1000);
        Serial.print("PHASE 1 HAS GONE");   
        delay(1000);
        Serial.write(0x1A);
        delay(1000);
        loop2();
        break;

    case 3:

        digitalWrite(ledPin, HIGH);         
        Serial.print("AT+CMGF=1\r");    
        delay(1000);
        Serial.print("AT+CMGS=\"+919512700997\"\r");    
        delay(1000);
        Serial.print("2 HAS GONE");   
        delay(1000);
        Serial.write(0x1A);
        delay(1000);
        break;

    case 4:
        digitalWrite(ledPin, HIGH);         
        Serial.print("AT+CMGF=1\r");    
        delay(1000);
        Serial.print("AT+CMGS=\"+919512700997\"\r");    
        delay(1000);
        Serial.print("1 AND 2 HAS GONE");   
        delay(1000);
        Serial.write(0x1A);
        delay(1000);
        break;

    case 5:

        digitalWrite(ledPin, HIGH);         
        Serial.print("AT+CMGF=1\r");    
        delay(1000);
        Serial.print("AT+CMGS=\"+919512700997\"\r");    
        delay(1000);
        Serial.print("3 HAS GONE");   
        delay(1000);
        Serial.write(0x1A);
        delay(1000);
        Serial.print("AT+CNMI=2,2,0,0,0");
        break;

    case 6:

        digitalWrite(ledPin, HIGH);         
        Serial.print("AT+CMGF=1\r");    
        delay(1000);
        Serial.print("AT+CMGS=\"+919512700997\"\r");    
        delay(1000);
        Serial.print("1 AND 3 HAS GONE");   
        delay(1000);
        Serial.write(0x1A);
        delay(1000);
        break;

    case 8:

        digitalWrite(ledPin, HIGH);         
        Serial.print("AT+CMGF=1\r");    
        delay(1000);
        Serial.print("AT+CMGS=\"+919512700997\"\r");    
        delay(1000);
        Serial.print("2 AND 3 HAS GONE");   
        delay(1000);
        Serial.write(0x1A);
        delay(1000);
        break;

    case 10:

        digitalWrite(ledPin, HIGH);         
        Serial.print("AT+CMGF=1\r");    
        delay(1000);
        Serial.print("AT+CMGS=\"+919512700997\"\r");    
        delay(1000);
        Serial.print("ALL 3 HAS GONE");   
        delay(1000);
        Serial.write(0x1A);
        delay(1000);
        break;


    default:
        x1,x2,x3,fault=0;
        digitalWrite(ledPin, LOW);
        break;

    }

    x1,x2,x3,fault=0;
    digitalWrite(ledPin, LOW);
    do
    {  
        int analogValue1 = analogRead(analogPin1);
        int analogValue2 = analogRead(analogPin2);
        int analogValue3 = analogRead(analogPin3);
    }
    while ( analogValue1 < thresold || analogValue2 < thresold || analogValue3 < thresold );


}

do
{  
    int analogValue1 = analogRead(analogPin1);
    int analogValue2 = analogRead(analogPin2);
    int analogValue3 = analogRead(analogPin3);
}
while (( analogValue1 > th) && (analogValue2 > th) && (analogValue3 > th));

}

void loop2()
{ 
    if (( analogValue1 > th) && (analogValue2 > th) && (analogValue3 > th)) 
    {

        digitalWrite(ledPin, HIGH);
        Serial.begin(9600);   
        Serial.print("\r");
        delay(1000);                  
        Serial.print("AT+CMGF=1\r");    
        delay(1000);
        Serial.print("AT+CMGS=\"+919512700997\"\r");    
        delay(1000);
        Serial.print("Nikunjsinh2");   
        delay(1000);
        Serial.write(0x1A);
        delay(1000);
        Serial.print("\r");
        delay(1000); 
        Serial.print("AT+CMGF=1\r");    
        delay(1000);
        Serial.print("AT+CMGS=\"+919712554766\"\r");    
        delay(1000);
        Serial.print("Nikunjsinh2");   
        delay(1000);
        Serial.write(0x1A);
        delay(1000);

        do
        {  
            int analogValue1 = analogRead(analogPin1);
            int analogValue2 = analogRead(analogPin2);
            int analogValue3 = analogRead(analogPin3);
        }
        while (( analogValue1 > th) && (analogValue2 > th) && (analogValue3 > th));
    }
}