i want to combine below two codes

Question

*****1st code

int sensoroutput = 3; // the analog pin connected to the sensor
int sensorinput = A0;
int THRESHOLD = 100;
void setup()
{
    pinMode(3, OUTPUT);
    pinMode(A0, INPUT);   // this function is used to declare gsm connected pin as output
}
void loop()
{
    int value = analogRead(sensorinput);  // function to read analog voltage from sensor
    if (value >= THRESHOLD)                    // function to check voltage level from sensor
    {
        digitalWrite(3, HIGH);
        delay(100);
    }
    else
        digitalWrite(3, LOW);
}

2nd code****

#include <SoftwareSerial.h>
SoftwareSerial sim800l(0, 1); // RX,TX for Arduino and for the module it's TXD RXD, they should be inverted
#define button1 7 //Button pin, on the other pin it's wired with GND
bool button_State; //Button state
void setup()
{
    pinMode(button1, INPUT_PULLUP); //The button is always on HIGH level, when pressed it goes LOW
    sim800l.begin(9600);   //Module baude rate, this is on max, it depends on the version
    Serial.begin(9600);
    delay(1000);
}
void loop()
{
    button_State = digitalRead(button1);   //We are constantly reading the button State
if (button_State == LOW) {            //And if it's pressed
    Serial.println(&quot;Button pressed&quot;);   //Shows this message on the serial monitor
    delay(200);                         //Small delay to avoid detecting the button press many times

    SendSMS();                          //And this function is called
}

if (sim800l.available()) {            //Displays on the serial monitor if there's a communication from the module
    Serial.write(sim800l.read());
}

}
void SendSMS()
{
    Serial.println("Sending SMS...");               //Show this message on serial monitor
    sim800l.print("AT+CMGF=1\r");                   //Set the module to SMS mode
    delay(100);
    sim800l.print("AT+CMGS=&quot;+918707578617&quot;\r");  //Your phone number don't forget to include your country code, example +212123456789"
    delay(500);
    sim800l.print("SIM800l is working");       //This is the text to send to the phone number, don't make it too long or you have to modify the SoftwareSerial buffer
    delay(500);
    sim800l.print((char)26);// (required according to the datasheet)
    delay(500);
    sim800l.println();
    Serial.println("Text Sent.");
    delay(500);
}