speedup and down dc motor

// Gabby Shimoni 02062019
// Move DC motor back and forth

#define motorInPin1 7
#define motorInPin2 8
#define enablePin 9
void setup() {
  pinMode(motorInPin1, OUTPUT);
  pinMode(motorInPin2, OUTPUT);
  pinMode(enablePin, OUTPUT);
}

void loop() {
  // speed up clockwise
  for (int Speed = 50; Speed <= 250; Speed += 50) {
    analogWrite(enablePin, Speed);
    digitalWrite(motorInPin1, HIGH);
    digitalWrite(motorInPin2, LOW);
    delay(2000);
  }
  // slow down clockwise
  for (int Speed = 250; Speed >= 50; Speed -= 50) {
    analogWrite(enablePin, Speed);
    digitalWrite(motorInPin1, HIGH);
    digitalWrite(motorInPin2, LOW);
    delay(2000);
  }
  // stop motor
  analogWrite(enablePin, 0);
  delay(1000);
}