int ledBuzz = 13;
int reedSwitch = 2;
int switchState;

void setup() {
  // put your setup code here, to run once:
pinMode (ledBuzz, OUTPUT);
pinMode (reedSwitch, INPUT);

}

void loop() {

switchState = digitalRead(reedSwitch);

if (switchState == HIGH)
{
     digitalWrite(ledBuzz, HIGH);
}

else
{
  digitalWrite(ledBuzz, LOW);
}

}