int E1 = 6;
int M1 = 7;
int E2 = 5;
int M2 = 4;
int speed=255;

void setup() 
{
  pinMode(M1, OUTPUT);
  pinMode(M2, OUTPUT);
  digitalWrite(M1,HIGH);
  digitalWrite(M2, HIGH);
  analogWrite(E1, speed); 
  analogWrite(E2, speed);
}

void loop() 
{

}