#define DATA_PIN 8
#define CLOCK_PIN 7

void clockOut(int value) {
digitalWrite(DATA_PIN, value);
digitalWrite(CLOCK_PIN, 0);
delayMicroseconds(7);
digitalWrite(CLOCK_PIN, 1);
delayMicroseconds(3);
}

void setup() {
// put your setup code here, to run once:
pinMode(CLOCK_PIN, OUTPUT);
pinMode(DATA_PIN, OUTPUT);
}

void loop() {
// put your main code here, to run repeatedly:
clockOut(0);
clockOut(0);
clockOut(0);

clockOut(1);

clockOut(0);

clockOut(1);
clockOut(1);

clockOut(0);

clockOut(1);
clockOut(1);
clockOut(1);

clockOut(0);

clockOut(1);
clockOut(1);
clockOut(1);
clockOut(1);

delayMicroseconds(2);
digitalWrite(DATA_PIN, 0);
digitalWrite(CLOCK_PIN, 0);
}