int M11 = 8;
int M22 = 1;
int en = 7;

void setup() {
  // put your setup code here, to run once:
pinMode(M11, OUTPUT);
pinMode(M22, OUTPUT);
pinMode(en, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(M11, LOW);
  digitalWrite(M22, HIGH);
  analogWrite(en, 255);
  delay(2000);

  digitalWrite(M11, LOW);
  digitalWrite(M22, LOW);
  analogWrite(en, 255);
  delay(2000);

  digitalWrite(M11, HIGH);
  digitalWrite(M22, LOW);
  analogWrite(en, 255);
  delay(2000);
  
  digitalWrite(M11, LOW);
  digitalWrite(M22, LOW);
  analogWrite(en, 255);
  delay(2000);
}