void setup() {
    // put your setup code here, to run once:
      Serial.begin(115200);
        pinMode(14, OUTPUT);
          pinMode(21, INPUT);
          }

          void loop() {
            int switchcase = digitalRead(21);
              if(switchcase == 1){
                digitalWrite(14, HIGH);
                  }
                    else{
                      
                         digitalWrite(14, LOW);
                           } 
                           }