blink and delay and slide

#include "msp.h"
#define SYSTICK_STCSR (*((volatile unsigned long *)0xE000E010))
#define SYSTICK_STRVR (*((volatile unsigned long *)0xE000E014))
#define SYSTICK_STCVR (*((volatile unsigned long *)0xE000E018))

void SysTick_Init(void);
void SysTick_wait(uint32_t delay);
void SysTick_wait1ms(uint32_t delay);
void Port_Init(void);
unsigned char led;

int main(void) {
    SysTick_Init();
    Port_Init();
    led = 0x01;
    while (1) {
        P2OUT = led;
        SysTick_wait1ms(1000);
        P2OUT = 0x00;
        SysTick_wait1ms(1000);
    }
}

void SysTick_Init(void) {
    SYSTICK_STCSR = 0;
    SYSTICK_STRVR = 0x00FFFFFF;
    SYSTICK_STCVR = 0;
    SYSTICK_STCSR = 0x00000005;
}

void SysTick_wait(uint32_t delay) {
    SYSTICK_STRVR = delay - 1;
    SYSTICK_STCVR = 0;
    while ((SYSTICK_STCSR & 0x00010000) == 0) {
    }
}

void SysTick_wait1ms(uint32_t delay) {
    uint32_t i;
    for (i = 0; i < delay; i++) {
        SysTick_wait(3000);
    }
}

void Port_Init(void) {
    P1SEL1 = 0x00;
    P1SEL0 = 0x00;
    P1DIR = 0x00;
    P1REN = 0x12;
    P1OUT = 0x12;
    P1IES = 0x12;
    P1IFG = 0;
    P1IE = 0x12;
    P2SEL1 = 0x00;
    P2SEL0 = 0x00;
    P2DIR = 0x07;
    P2OUT = 0x00;
    NVIC_EnableIRQ(PORT1_IRQn);
    __enable_irq();
}

void PORT1_IRQHandler(void){
    if (P1IFG&0x02){
        led = led << 1;
            if (led == 0x08){
                led = 0x01;
            }
        }
    if (P1IFG&0x10){
        led = led >> 1;
            if (led == 0x00){
                led = 0x04;
            }
        }
    P1IFG &= 0x00;
}