//Pin connected to ST_CP of 74HC595
int L = 1;
//Pin connected to SH_CP of 74HC595
int CLK = 2;
////Pin connected to DS of 74HC595
int DAT = 0;
unsigned int I,J,K;
void setup() {
  pinMode(L, OUTPUT);  pinMode(CLK, OUTPUT);  pinMode(DAT, OUTPUT);
}
void HC595_L(unsigned int D){
		digitalWrite(L, LOW);
		shiftOut(DAT, CLK, LSBFIRST, D&0xFF);  
		shiftOut(DAT, CLK, LSBFIRST, (D&0xFF00)>>8); 
		digitalWrite(L, HIGH);
}
void HC595_M(unsigned int D){
		digitalWrite(L, LOW);
		shiftOut(DAT, CLK, MSBFIRST, (D&0xFF00)>>8); 
		shiftOut(DAT, CLK, MSBFIRST, D&0xFF);  
    	digitalWrite(L, HIGH);
}
void loop() {
	for ( J=0;J<16;J++) {
			K = 1<<J; HC595_L(K); delay(150);
	}
	for (J=0;J<3;J++) {
		HC595_L(0xFFFF); delay(1000);
		HC595_L(0x0000); delay(1000);
	}
	for ( J=0;J<16;J++) {
			K = 1<<J; HC595_M(K); delay(150);
	}
	for (J=0;J<3;J++) {
		HC595_L(0xFFFF); delay(1000);
		HC595_L(0x0000); delay(1000);
	}
}