// Motor Driver 
// Darcy Chang 
// 6/6/19 
// Arduino 1.8.5 
const int 
OnBoardPin = 13; 
const int Dlay = 20; 

void setup() 
{ 
  // put your setup code here, to run once: 
  pinMode(9,OUTPUT); // set the pin modes to output 
  pinMode(10, OUTPUT); 
  pinMode(11,OUTPUT); 
  pinMode(12,OUTPUT); 
  pinMode(OnBoardPin,OUTPUT); 
} 

void loop() 
{ 
  // put your main code here to run repeatedly: 
  blinky(); 
  forward(); 
}
 
void blinky() 
{ 
  digitalWrite(OnBoardPin, LOW); // flash on board LED 
  delay(Dlay); 
  digitalWrite(OnBoardPin, HIGH); 
  delay(Dlay); 
} 

void forward() 
{ 
  digitalWrite(9, HIGH); // make left motor move forward 
  digitalWrite(10,LOW);
  digitalWrite(11,HIGH); // make right motor move forward 
  digitalWrite(12,LOW); 
} 
void stopBot() 
{ 
  digitalWrite(9,LOW); // stop both motors 
  digitalWrite(10,LOW); 
  digitalWrite(11,LOW); 
  digitalWrite(12,LOW); 
}