//Motor 1 -> 10,9 speed -> 11
//Motor 2 -> 8,7 speed -> 6 
int motor[4] = {10,9,8,7};
int sped[2] = {11,6};
void setup() {
  
//Motor Setup
  for(int i = 0; i<6; i++){
    pinMode(motor[i], OUTPUT);
    digitalWrite(motor[i], LOW);
  }
}

void loop() {
  setSpeedAll(255);
  vw(0);
  delay(500);
  stopall();
  delay(100);
  vw(1);
  delay(500);
  stopall();
  delay(100);
  rw(0);
  rw(1);
  delay(1000);
  stopall();
  delay(10); 
  
  vw(0);
  for(int i = 0;i<255;i++){
    setSpeet(0,i);
    delay(20);
  }
  delay(100);
   for(int i = 255;i > 0;i--){
    setSpeet(0,i);
    delay(20);
  }

}

//set speed for motor n with value s
void setSpeet(int n,int s){
  analogWrite((sped[n]),s);
}

//set speed for all motors with value s
void setSpeedAll(int s){
  for( int i = 0; i<2; i++){
    setSpeet(i,s);  
  }
}


// turn motor n forward
void vw(int n){
   digitalWrite(motor[n*2], LOW); 
   digitalWrite(motor[n*2+1], HIGH);
}

//turn motor n backwards
void rw(int n){
   digitalWrite(motor[n*2], HIGH); 
   digitalWrite(motor[n*2+1], LOW);
  
}

// stop Motor n
void st(int n){
   digitalWrite(motor[n*2], LOW); 
   digitalWrite(motor[n*2+1], LOW);
  
}

//stop all motors
void stopall(){
  for( int i = 0; i<2; i++){
    st(i);  
  }
}