Cpp
// Blink.ino
// A simple LED blink example for the Arduino Mega2560

void setup() {
  // Initialize digital pin 13 as an output
  pinMode(13, OUTPUT);
}

void loop() {
  digitalWrite(13, HIGH);   // Turn the LED on
  delay(1000);              // Wait for one second
  digitalWrite(13, LOW);    // Turn the LED off
  delay(1000);              // Wait for one second
}

1. Locate the project file tree on the left side of the interface.
2. Click the option to create a new code file (often labeled "New Code File" or similar).
3. Once the new file opens in an editable mode, paste your Arduino sketch there.
4. Save your changes.