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

#include "stm32c0xx.h"// Device header

int main(void)
{
  RCC->IOPENR  |= (1UL << 1); // Enable GPIOB clock
  GPIOB->MODER &= ~(3UL << 8); // Clear PB4 mode
  GPIOB->MODER |= (1UL << 8); // Set PB4 to output mode
  GPIOB->MODER &= ~(3UL << 10); // Clear PB5 mode
  GPIOB->MODER |= (1UL << 10); // Set PB5 to output mode
  GPIOB->MODER &= ~(3UL << 12); // Clear PB6 mode
  GPIOB->MODER |= (1UL << 12); // Set PB6 to output mode
  while (1)
  {
    for (int i = 0; i < 8; i++)
    {
      GPIOB->ODR = (i << 4);
      myDelay(1000); // Delay
    }
  }
}