SunFounder 3in1 Kit - How to re-burn the firmware for ESP8266 module?

SunFounder 3in1 Kit
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turnRight(150);
} else if (Xvalue <= -5) {
turnLeft(150);
} else {
stopMove();
}
Also, add a network status determination to loop() to light up an LED if it is connected to Blynk Cloud.
if (!Blynk.connected()) {
digitalWrite(ledPin, LOW);
Serial.print("offline!");
bool result = Blynk.connect();
Serial.println(result);
} else {
digitalWrite(ledPin, HIGH);
}
6.8. 8. IoT Car 331