// HARDWARE IS SAME AS 1ST but here blink it uing 2nd push button 
//just change 01-02 in if condition

#include <stdint.h>

#define PINA   (*(volatile uint8_t*)0x20)
#define DDRA   (*(volatile uint8_t*)0x21)
#define PORTA  (*(volatile uint8_t*)0x22)

#define PINB   (*(volatile uint8_t*)0x23)
#define DDRB   (*(volatile uint8_t*)0x24)
#define PORTB  (*(volatile uint8_t*)0x25)

void delay(void){
    for(volatile uint32_t i=0;i<50000;i++);
}

int main(void){
    DDRA = 0xFF;      
    DDRB = 0x00;      
    

    while(1){
        if((PINB & 0x02) == 0x02){  
            PORTA = 0xFF;
            delay();
            PORTA = 0x00;
            delay();
        } else {
            PORTA = 0x00;
        }
    }
}