//code for controlling the speed of the motor

#define motorA D2
#define motorB D3

void setup() {
  Serial.begin(115200);
  pinMode(motorA, OUTPUT);
  pinMode(motorB, OUTPUT);
}

void loop() {
  // Forward (slow)
  analogWrite(motorA, 20);  // speed
  digitalWrite(motorB, LOW);
  delay(5000);

  // Reverse (slow)
  digitalWrite(motorA, LOW);
  analogWrite(motorB, 20);
  delay(5000);

  // Stop
  digitalWrite(motorA, LOW);
  digitalWrite(motorB, LOW);
  delay(3000);
}