project on traffic light

now i wan sen data to be shown in pc.I use visual basic for that. im using Atmega 32 to programme the traffic light..i have the programme ready and its function well..now the problem how to write the coding to send the data to rs232..if let say the red_1 blink its mean '1'...how to send it via rs 232 and max 232 to my visual basic software...can anyone help me...i have attached my coding and my schematic of circuit and the interface..anybody please help me

#include <mega32.h>
#include <delay.h>

#define red_1 PORTA.0
#define yellow_1 PORTA.1
#define green_1 PORTA.2
#define RXD PORTD.0
#define TXD PORTD.1


void main(void){
PORTA=0x00;
DDRA=0xFF;
PORTB=0x00;
DDRB=0x03;
PORTC=0x00;
DDRC=0xFF;
PORTD=0x00;
DDRD=0xFF;



while (1)
{
red_1=0;
green_1=1;
delay_ms(1500);
green_1=0;
yellow_1=1;
delay_ms(1500);
yellow_1=0;
red_1=1;
delay_ms(1500);
};
}



how to edit this so that i can send data to rs232 from atmega32