int speed1=5;
int dir1=4;
int dir2=3;
int Mspeed=255;
void setup() {
  // put your setup code here, to run once:
pinMode(speed1,OUTPUT);
pinMode(dir1 ,OUTPUT);
pinMode(dir2, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(dir1, LOW);
digitalWrite(dir2,HIGH);
analogWrite(speed1,Mspeed);

}