// Stepper Motor Sequences 
// by Juan Manuel González V. 

void setup() 
{ 
  int i; 
  for(i=0; i<3; i++) {        //Analog pins for yellow, red, 
    pinMode(i, OUTPUT);       //blue and white wires of the motor. 
  } 
 
  pinMode(48, OUTPUT);        //Wiring led pin 48. 
  digitalWrite(48, HIGH); 
} 
 
 
void stepforward()            //Drive sequence for one cycle going 
{                             //forward.         
  digitalWrite(0, HIGH); 
  digitalWrite(1, LOW); 
  digitalWrite(2, LOW); 
  digitalWrite(3, LOW); 
  delay(30); 
  digitalWrite(0, LOW); 
  digitalWrite(1, HIGH); 
  digitalWrite(2, LOW); 
  digitalWrite(3, LOW); 
  delay(30); 
  digitalWrite(0, LOW); 
  digitalWrite(1, LOW); 
  digitalWrite(2, HIGH); 
  digitalWrite(3, LOW); 
  delay(30); 
  digitalWrite(0, LOW); 
  digitalWrite(1, LOW); 
  digitalWrite(2, LOW); 
  digitalWrite(3, HIGH); 
  delay(30); 
} 
 
void stepbackward()            //Drive sequence for one cycle going    
{                              //backward. 
  digitalWrite(0, LOW); 
  digitalWrite(1, LOW); 
  digitalWrite(2, LOW); 
  digitalWrite(3, HIGH); 
  delay(30); 
  digitalWrite(0, LOW); 
  digitalWrite(1, LOW); 
  digitalWrite(2, HIGH); 
  digitalWrite(3, LOW); 
  delay(30); 
  digitalWrite(0, LOW); 
  digitalWrite(1, HIGH); 
  digitalWrite(2, LOW); 
  digitalWrite(3, LOW); 
  delay(30); 
  digitalWrite(0, HIGH); 
  digitalWrite(1, LOW); 
  digitalWrite(2, LOW); 
  digitalWrite(3, LOW); 
  delay(30); 
} 
 
void loop() 
{ 
  stepforward();         //Repeats the required sequence over & 
  //over to make the motor turn continuously FW. 
  //stepbackward();        //Repeats the required sequence over & 
  //over to make the motor turn continuously BW. 
}