#pragma GCC push_options
#pragma GCC optimize ("O0")

#include "stm32c0xx.h"


// Include function declarations
void myDelay(unsigned int val);


int main(void)
{

  // Enable GPIOA and configure PD0 as an output pin
  RCC->IOPENR |= (1UL << 0);
  GPIOA -> MODER &= ~(3UL<<2);//PA1
  GPIOA ->MODER |= (1UL<<2);
  GPIOA->MODER &=~(3UL<<8);//PA4
  GPIOA->MODER |=(1UL<<8);
  GPIOA->MODER &=~(3UL<<14);//PA7
  GPIOA->MODER |=(1UL<<14);
  GPIOA->MODER &=~(3UL<<18);//PA10
  GPIOA->MODER |=(1UL<<18);
  GPIOA->MODER &=~(3UL<<20);//PA10
  GPIOA->MODER |=(1UL<<20);


  while (1)
  {
    int x;
    for(x=0;x<4;x++)
    {
      GPIOA->ODR = (x<<9);
      myDelay(1000);
    }
   

  }


}

// Add function definitions here
void myDelay(unsigned int val)
{
  int i;
  for (i = 0; i < val; i++);

}