#include <REG51.H>
sbit LED = P1^0;

void delay(void) {
    TMOD = 0x01;
    TH0 = 0xFC;
    TL0 = 0x74;
    TF0 = 0;
    TR0 = 1;
    while (TF0 == 0);
    TR0 = 0;
    TF0 = 0;
}

void main(void) {
    while (1) {
        LED = !LED;
        delay();
    }
}
