int latchpin=11;
int clockpin=9;
int datapin=12;
byte mybyte=0b11111110;
int dt=500;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(latchpin, OUTPUT);
pinMode(datapin, OUTPUT);
pinMode(clockpin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(latchpin, LOW);
shiftOut(datapin,clockpin,LSBFIRST,mybyte);
digitalWrite(latchpin, HIGH);
Serial.println(mybyte,BIN);
delay(dt);
mybyte=mybyte/128+mybyte*2;

}