Laser security system

int sensorPin = A5;    
int sensorValue = 0;  
int thresholdValue = 500; 
#define BUZ 3; 
#define LIGHT 10;
void setup() {
Serial.begin(9600); 
pinMode(3,OUTPUT); 
pinMode(10,OUTPUT);  
}
void loop() {
digitalWrite(10,HIGH); 
delay(100);
digitalWrite(10,LOW); 
sensorValue = analogRead(sensorPin);
if(sensorValue < thresholdValue){   
Serial.println(1); 
digitalWrite(10,LOW);
digitalWrite(11,LOW);  
delay(100000);                
}
else if(sensorValue > thresholdValue){   
Serial.println(0); 
digitalWrite(10,HIGH);
digitalWrite(11,HIGH);
}
delay(40);                        
}