const int leftForward = 2;
const int leftBackward = 3;
const int rightForward = 4;
const int rightBackward = 5;
void setup()
{
pinMode(leftForward , OUTPUT);
pinMode(leftBackward , OUTPUT);
pinMode(rightForward , OUTPUT);
pinMode(rightBackward , OUTPUT);
}
void loop()
{
digitalWrite(leftForward , HIGH);
digitalWrite(leftBackward , LOW);
digitalWrite(rightForward , HIGH);
digitalWrite(rightBackward , LOW);

}