Shift out multiple registers

shift_out.ino

#include <math.h>


int latch = 10,
  clk = 11,
	data = 12;

void setup(){

	pinMode( latch , OUTPUT );
	pinMode( clk, OUTPUT );
	pinMode( data, OUTPUT );

	Serial.begin( 9600 );
	Serial.println( "reset" );
}



void loop(){

	
	if(  Serial.available() > 0 ){

		int bt = Serial.parseInt();
		
		Serial.println( bt );

		Serial.println( bt ); // register 1
		Serial.println( (bt >> 16) ); // register 2
		Serial.println( (bt >> 8) ); // register 3




		digitalWrite( latch, LOW );

		// shiftOut( data, clk, MSBFIRST, highByte(bt) ); //high is numbers on the second register
		// shiftOut( data, clk, MSBFIRST, lowByte(bt) ); //low is numbers on the first register

		//shift registers must count down from 3 to 1
		shiftOut( data, clk, MSBFIRST, (bt >> 8) );
		shiftOut( data, clk, MSBFIRST, (bt >> 16) );
		shiftOut( data, clk, MSBFIRST, bt ); 
		

		digitalWrite( latch, HIGH );
		delay( 500 );
	}

}