#include "stm32f4xx.h"

void delay(int time) {
    while(time--) {
        for (int i = 0; i < 5000; i++);
    }
}

int main(void) {
    RCC->AHB1ENR |= RCC_AHB1ENR_GPIODEN;
    GPIOD->MODER |= (1 << 24);
    
    while (1) {
        GPIOD->ODR |= (1 << 12);
        delay(1000);
        GPIOD->ODR &= ~(1 << 12);
        delay(1000);
    }
}