STMF401RE Nucleo issue

gistfile1.txt

#include "stm32f4xx.h"
																		  
int main (void)
{
    RCC->AHB1RSTR |= RCC_AHB1RSTR_GPIODRST;    // Reset GPIOD 
    RCC->AHB1RSTR = 0;                         // Exit reset state
    
    RCC->AHB1ENR |= RCC_AHB1ENR_GPIODEN;       // Enable GPIOD clock
    GPIOD->MODER |= GPIO_MODER_MODER13_0;	   // Enable Output on D13
    
    GPIOD->BSRR = GPIO_BSRR_BS_13;			   // Set D13 High

  return 0;
}