const uint8_t pinDir = 6;
const uint8_t pinStep = 7;

void setup() 
{
    pinMode( pinDir, OUTPUT );
    pinMode( pinStep, OUTPUT );

}//setup

void loop() 
{
    digitalWrite( pinDir, LOW );
    stepMotor();
    digitalWrite( pinDir, HIGH );
    stepMotor();

}//loop

void stepMotor( void )
{
    for( uint16_t i=0; i<1000; i++ )
    {
        digitalWrite( pinStep, LOW );
        delayMicroseconds( 2000ul );
        digitalWrite( pinStep, HIGH );
        delayMicroseconds( 2000ul );
        
    }//for
    
}//stepMotor