code.c

int latchPin = 10;
int clockPin = 9;
int dataSerial = 8;
boolean currentValue[8] = {false, false, false, false, false, false, false, false};
int i;

void setup() {
  // put your setup code here, to run once:
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataSerial, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int i = 1;
  i--;
  currentValue[i] = !currentValue[i];
  digitalWrite(latchPin, LOW);
  for ( i = 0; i < 8 ; i++ )
  {
    digitalWrite(clockPin, LOW);
    digitalWrite(dataSerial, currentValue[i] ? HIGH:LOW);
    digitalWrite(clockPin, HIGH);
  }
  digitalWrite(latchPin, HIGH);

}