//Lab 9-1
#include <SPI.h>
byte data;
void setup()
{
  SPI.begin();
  digitalWrite(SS, HIGH);
  delay(1);
}

void loop()
{
  int i;
  digitalWrite(SS, LOW);
  SPI.transfer(0x55);
  digitalWrite(SS, HIGH);
  delay(500);

  digitalWrite(SS, LOW);
  SPI.transfer(0xAA);
  digitalWrite(SS, HIGH);
  delay(500);

}