const int motorA = 5;
const int motorB = 6;
const int dirA = 7;
const int dirB = 8;
void setup() {
  pinMode(motorA, OUTPUT);
  pinMode(motorB, OUTPUT);
  pinMode(dirA, OUTPUT);
  pinMode(dirB, OUTPUT);
}

void loop() {
  digitalWrite(dirA, HIGH);
  digitalWrite(dirB, LOW);
  analogWrite(motorA, 150);
  analogWrite(motorB, 150);
}