void setup(){
  pinMode(3, OUTPUT);
  // put your setup code here, to run once:
  Serial1.begin(115200);
  Serial1.println("Hello, Raspberry Pi Pico W!");
}

void loop() {
  for ( int i=100;i<4025;i++){
    Serial1.println(i);
    analogWrite(3,i);
  delay(100);
    
  }
  
  }