Question about my Sketch.

Using Arduino Programming Questions
12

So...

If it's just "nothing happens", we're back to what I said, test some pieces

/*
   Mowbot Test Sketch 1 -- Motor
*/
   
const int LEFT_MOTOR=12, LEFT_BRAKE=9, LEFT_SPINNER=3;
const int FORWARD=HIGH, REVERSE=LOW;
const int FULLSPEED=255;

void leftMotor( int direction, int speed)
{
    digitalWrite( LEFT_MOTOR, direction); //Establishes direction
    digitalWrite( LEFT_BRAKE , LOW);      //Disengage the Brake
    digitalWrite( LEFT_SPINNER, speed);   //Spins the motor
}

void setup() 
{ 
    pinMode(LEFT_MOTOR, OUTPUT);   
    pinMode(LEFT_BRAKE, OUTPUT);
}

void loop() 
{
    leftMotor( FORWARD, FULLSPEED);
    delay( 4000); 	   // on and off every 4 seconds
    leftMotor( FORWARD, 0 );
    delay( 4000);
}