int LEDred = 3;
int PIRsensor =7;
int Goku = 5;
boolean start = false;

void setup() {
  // put your setup code here, to run once:

Serial.begin(9600);
pinMode(LEDred, OUTPUT);
pinMode(PIRsensor, INPUT);
pinMode(Goku, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
if(digitalRead(PIRsensor) == HIGH){
digitalWrite(LEDred, HIGH);
tone(Goku, 900);
Serial.println("TARGET DETECTED");
}

else{
digitalWrite(LEDred, LOW);
noTone(Goku);
Serial.println("TARGET HAS ESCAPED");
}

}