const int SER =8;
const int LATCH = 9;
const int CLK = 10;

void setup()
{
 pinMode (SER, OUTPUT);
 pinMode (LATCH, OUTPUT);
 pinMode (CLK, OUTPUT);

digitalWrite (LATCH, LOW);
shiftOut (SER, CLK, MSBFIRST, B00000000);
digitalWrite (LATCH, HIGH);
delay(1000);
digitalWrite (LATCH, LOW);
shiftOut (SER, CLK, MSBFIRST, B11111111);
digitalWrite (LATCH, HIGH);

}

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

}