L298n for D.C. Motor

void setup() {

  pinMode(7, OUTPUT);

  pinMode(8, OUTPUT);

  pinMode(9, OUTPUT);

  pinMode(10, OUTPUT);

  pinMode(11, OUTPUT);

  pinMode(12, OUTPUT);

}

void loop() {

      // Motor #1 Pin 1 and 2

  analogWrite(7, 255);   // Pin #7 = Motor #1 Speed 0 to 255 Max

  digitalWrite(8, HIGH); // Pins # 8 and #9 Direction

  digitalWrite(9, LOW);

  delay(2000);

      // Motor #1 Pin 1 and 2

  analogWrite(7, 150);   // Pin #7 = Motor #1 Speed 0 to 255 Max

  digitalWrite(8, LOW);  // Pins # 8 and #9 Reverse Direction

  digitalWrite(9, HIGH);

  delay(2000);

  analogWrite(7, 0);      // Stop Motor #1

      // Motor #2 Pin 3 and 4

  analogWrite(12, 255);   // Pin #12 = Motor #2 Speed 0 to 255 Max

  digitalWrite(10, HIGH); // Pins # 10 and #11 Direction

  digitalWrite(11, LOW);

  delay(2000);

      // Motor #2 Pin 3 and 4

  analogWrite(12, 150);   // Pin #12 = Motor #2 Speed 0 to 255 Max

  digitalWrite(10, LOW);  // Pins # 10 and #11 Reverse Direction

  digitalWrite(11, HIGH);

  delay(2000);

  analogWrite(12, 0);      // Stop Motor #2

}