void DELAY(void)
{
unsigned char R;
for (R = 0; R<20; R++)
{
TMOD = 0X01;
TL0 = 0XAF;
TH0 = 0X3C;
TR0 = 1;
while (TF0 == 0)
{
;
}
TR0 = 0;
TF0 = 0;
}
}