GPIO commands for Blinking LED problem in simplisity studio - embedded

Question

I have the following commands
GPIO_PinOutClear(LED_PORT_E,15)
GPIO_PinModeSet(LED_PORT_A,15,gpioModePushPull,0)
GPIO_PinOutSet(LED_PORT_E,15)
I know that I should put ON value delay OFF value in a loop in order to make the LEDs blink constantly. I have tried to implement it, but it's not working.
Where did I go wrong?
#include <stdint.h>
#include <stdbool.h>
#include "em_device.h"
#include "em_chip.h"
#include "em_cmu.h"
#include "em_emu.h"
#include "bsp.h"
#include "bsp_trace.h"
#define LED_PORT_E gpioPortE
#define LED_PIN_E 15
#define LED_PORT_A gpioPortA
#define LED_PIN_A 15
volatile uint32_t msTicks; /* counts 1ms timeTicks */
void Delay(uint32_t dlyTicks);
/***************************************************************************//**
* #brief SysTick_Handler
* Interrupt Service Routine for system tick counter
******************************************************************************/
void SysTick_Handler(void)
{
msTicks++; /* increment counter necessary in Delay()*/
}
/***************************************************************************//**
* #brief Delays number of msTick Systicks (typically 1 ms)
* #param dlyTicks Number of ticks to delay
******************************************************************************/
void Delay(uint32_t dlyTicks)
{
uint32_t curTicks;
curTicks = msTicks;
while ((msTicks - curTicks) < dlyTicks) ;
}
/***************************************************************************//**
* #brief Main function
******************************************************************************/
int main(void)
{
/* Chip errata */
CHIP_Init();
CMU_ClockEnable(cmuClock_GPIO,true);
/* If first word of user data page is non-zero, enable Energy Profiler trace */
BSP_TraceProfilerSetup();
/* Setup SysTick Timer for 1 msec interrupts */
if (SysTick_Config(CMU_ClockFreqGet(cmuClock_CORE) / 1000)) {
while (1) ;
}
/* Initialize LED driver */
BSP_LedsInit();
BSP_LedSet(0);
GPIO_PinModeSet(LED_PORT_A,15,gpioModePushPull,0);
Delay(1000);
GPIO_PinModeSet(LED_PORT_E,15,gpioModePushPull,0);
while (1) {
GPIO_PinOutClear(LED_PORT_E,15);
GPIO_PinOutSet(LED_PORT_E,15);
}
}

Answer 1

Give delay in while loop .
while (1) {
GPIO_PinOutClear(LED_PORT_E,15);
Delay(1000);
GPIO_PinOutSet(LED_PORT_E,15);
Delay(1000);
}
If configuration of pins is ok then LEDS start blinking.