TM4C1231H6PM: Use different frequency to turn on LED by timer

I want to let the LED flash with 1 second by 1Hz timer, and use 5kHz timer to save the  current, but it doesn't turn on as I think. My finally goal is use 5kHz timer to save half of current then use 50kHz timer to save 60% current. It might use 3 timer, but when I use 2 timer, it doesn't work. Do I have something wrong ?

My code as follow :

#include <stdbool.h>
#include <stdint.h>
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "inc/hw_uart.h"
#include "driverlib/debug.h"
#include "driverlib/fpu.h"
#include "driverlib/interrupt.h"
#include "driverlib/timer.h"
#include "driverlib/rom.h"
#include "driverlib/rom_map.h"
#include "driverlib/gpio.h"
#include "driverlib/gpio.c"
#include "driverlib/pin_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/sysctl.c"
#include "driverlib/systick.h"
#include "driverlib/uart.h"
#include "driverlib/uart.c"
#include "driverlib/adc.h"

int sys_status;
int flash_status;
int press_status;
int stable_time = 0;

int flash_status_5k;
int On_count = 0;

void IRQ_Timer0AIntHandler(void)
{
    MAP_IntMasterDisable();
    MAP_TimerIntClear(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
    
    if (flash_status == 0)
    {
        flash_status = 1;
    }
    else if (flash_status == 1)
    {
        flash_status = 0;
    }
    
    MAP_IntMasterEnable();
}

void IRQ_Timer0BIntHandler(void)
{
    MAP_IntMasterDisable();
    MAP_TimerIntClear(TIMER0_BASE, TIMER_TIMB_TIMEOUT);
    
    if (flash_status == 0)
    {
        MAP_GPIOPinWrite(GPIO_PORTA_BASE, GPIO_PIN_4, 0);
    }
    if (flash_status == 1)
    {
        if (flash_status_5k == 0)
        {
            MAP_GPIOPinWrite(GPIO_PORTA_BASE, GPIO_PIN_4, 0);
            flash_status_5k = 1;
        }
        else if (flash_status_5k == 1)
        {
            MAP_GPIOPinWrite(GPIO_PORTA_BASE, GPIO_PIN_4, GPIO_PIN_4);
            flash_status_5k = 0;
        }
    }
    MAP_IntMasterEnable();
}

int
main(void)
{ 
    MAP_SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
                   SYSCTL_XTAL_16MHZ);

    // 
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
    
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
    // 
    MAP_GPIOPinConfigure(GPIO_PA0_U0RX);
    MAP_GPIOPinConfigure(GPIO_PA1_U0TX);
    // 
    HWREG(GPIO_PORTF_BASE + 0x520) = 0x4C4F434B;
    HWREG(GPIO_PORTF_BASE + 0x524) = 0x00FF;
    HWREG(GPIO_PORTF_BASE + 0x420) = 0x0000;
    HWREG(GPIO_PORTF_BASE + 0x51C) = 0x001F;
    // 
    MAP_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
    
    MAP_GPIOPinTypeGPIOOutput(GPIO_PORTA_BASE, GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7);
    MAP_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3);
    
    MAP_GPIOPinTypeGPIOOutput(GPIO_PORTD_BASE, GPIO_PIN_4);
    // 
    MAP_UARTConfigSetExpClk(UART0_BASE, MAP_SysCtlClockGet(), 115200,
                        (UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
                         UART_CONFIG_PAR_NONE));
    
    // Switch
    MAP_GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_4, GPIO_PIN_4);
    MAP_GPIOPadConfigSet(GPIO_PORTD_BASE, GPIO_PIN_4, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU);
    MAP_GPIOPinTypeGPIOInput(GPIO_PORTD_BASE, GPIO_PIN_4);

    // Timer0A 1Hz
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);
    
    MAP_TimerDisable(TIMER0_BASE, TIMER_A);
    MAP_TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC | TIMER_CFG_A_PERIODIC);
    MAP_TimerLoadSet(TIMER0_BASE, TIMER_A, MAP_SysCtlClockGet());
    MAP_TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
    MAP_IntEnable(INT_TIMER0A);
    
    // Timer0B 5kHz
    MAP_TimerDisable(TIMER0_BASE, TIMER_B);
    MAP_TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC | TIMER_CFG_B_PERIODIC);
    MAP_TimerLoadSet(TIMER0_BASE, TIMER_B, MAP_SysCtlClockGet() / 5000);
    MAP_TimerIntEnable(TIMER0_BASE, TIMER_TIMB_TIMEOUT);
    MAP_IntEnable(INT_TIMER0B);
    
    sys_status = 0;
    flash_status = 0;
    flash_status_5k = 0;
    uint32_t Key1status;

    while(1)
    {
        Key1status = MAP_GPIOPinRead(GPIO_PORTD_BASE, GPIO_PIN_4);
        
        if (Key1status != GPIO_PIN_4)
        {
            press_status = 1;
            stable_time = 0;
        }
        
        if (press_status == 1)
        {
            if (Key1status == GPIO_PIN_4)
            {
                stable_time++;
            }
        }
        
        if (stable_time >= 100)
        {
            if (sys_status == 0)
            {
              sys_status = 1;
            }
            else if (sys_status == 1)
            {
              sys_status = 2;
            }
            else if (sys_status == 2)
            {
              sys_status = 3;
            }
            else if (sys_status == 3)
            {
              sys_status = 1;
            }
            press_status = 0;
            stable_time = 0;
        }
        
        switch(sys_status)
        {
          case 0:
              break;
          case 1:
              MAP_GPIOPinWrite(GPIO_PORTA_BASE, GPIO_PIN_4, GPIO_PIN_4);
              break;
          case 2:
              MAP_GPIOPinWrite(GPIO_PORTA_BASE, GPIO_PIN_4, 0);
              break;
          case 3:
              MAP_TimerEnable(TIMER0_BASE, TIMER_A);
              MAP_TimerEnable(TIMER0_BASE, TIMER_B);
              break;
          default:
              break;
        }
    }
}