void setup() {  
  pinMode(20, INPUT); 
  pinMode(8, OUTPUT); 
  pinMode(4, OUTPUT); 
  Serial1.begin(115200);
  Serial1.println("Raspberry Pi Pico PIR Project");
}

void loop() {
  int pir=digitalRead(20);
  //Serial1.println(pir);
  if(pir>0){
    digitalWrite(8,HIGH);
    digitalWrite(4,HIGH);
    Serial1.println("Motion Detected");
  }else{
    digitalWrite(8,LOW);
    digitalWrite(4,LOW);
    Serial1.println("No Motion");
  }
  delay(500);
}