Code for blinking led on board STM32L-Discovery

STM32L_Blink_Led.c

#include "stm32l1xx.h"

void delay(unsigned int time) {
	for (time; time > 0; time--);
}

int main(void)
{
	RCC->AHBENR |= RCC_AHBENR_GPIOBEN;

	GPIOB->MODER |= GPIO_MODER_MODER7_0;
	GPIOB->OTYPER &= ~GPIO_OTYPER_ODR_7;
	GPIOB->OSPEEDR &= ~GPIO_OSPEEDER_OSPEEDR7_0;
	GPIOB->PUPDR &= ~GPIO_PUPDR_PUPDR7;

    while(1)
    {
    	GPIOB->ODR |= GPIO_ODR_ODR_7;
    	delay(700000);
    	GPIOB->ODR &= ~GPIO_ODR_ODR_7;
    	delay(700000);
    }
}

Thanks for this. I have published a systick based version here:
https://drolliblog.wordpress.com/2017/04/06/led-blink-with-the-stm32l031x6/

can anyone please please correct my code because the led turns on but does not blink. I am using systick timer for i second delay.
thanks
k.arif4@hotmail.com

#include"stm32l1xx.h"

int main(void)

 {
RCC -> AHBENR |= RCC_AHBENR_GPIOBEN;
  GPIOB->MODER &= ~GPIO_MODER_MODER6;
  GPIOB->MODER |= GPIO_MODER_MODER6_0;
  GPIOB->OTYPER &= -(GPIO_OTYPER_OT_6);
  GPIOB->OSPEEDR &= ~GPIO_OSPEEDER_OSPEEDR6;
  GPIOB->PUPDR &= ~GPIO_PUPDR_PUPDR6;


    SysTick->LOAD = 319999;
    SysTick->VAL = 0;
    SysTick->CTRL = 5;

  while(1) {
     if (( SysTick->CTRL &= SysTick_CTRL_COUNTFLAG)==0)

      {
	        GPIOB -> BSRRL|= GPIO_BSRR_BS_6;   // turn led on
            SysTick->CTRL = 5;
       }
        else

       {
        	GPIOB ->BSRRH |= GPIO_BSRR_BR_6;

       }

    }

}