void setup() {
  // put your setup code here, to run once:
  Serial1.begin(115200);
  Serial1.println("Hello, Raspberry Pi Pico!");
  const int RS = 28;
  const int enable = 27;
  const int D4 = 26;
  const int D5 = 22;
  const int D6 = 21;
  const int D7 = 20;

}

void loop() {
  // put your main code here, to run repeatedly:
  delay(1); // this speeds up the simulation
}