#define yellow 0
#define green 28
void setup() {
  pinMode(yellow, OUTPUT);
  pinMode(green, OUTPUT);
  // put your setup code here, to run once:
  // Serial1.begin(115200);
  // Serial1.println("Hello, Raspberry Pi Pico!");
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(yellow, HIGH);
  digitalWrite(green, LOW);
  delay(200);
  digitalWrite(yellow, LOW);
  digitalWrite(green, HIGH);
  delay(200);
  
   // this speeds up the simulation
}