bicolor_step.ino

int redPin = 3;
int greenPin = 6;
int stepDelay = 1000;

void setup() {
  // put your setup code here, to run once:
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);

  digitalWrite(redPin, LOW);
  digitalWrite(greenPin, LOW);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(redPin, HIGH);
  delay(stepDelay);
  
  digitalWrite(greenPin, HIGH);
  delay(stepDelay);
  
  digitalWrite(redPin, LOW);
  delay(stepDelay);
  
  digitalWrite(greenPin, LOW);
  delay(stepDelay);
}