Breathing light program using 51 single chip microcomputer

//Crystal oscillator 11.0592
//The light changes gradually from bright to dark under the control of the single-chip microcomputer, and it feels like breathing.
//This example uses a digital tube and an LED light on the 51hei-5 development board to achieve a breathing effect.
//File download: http://www.51hei.com/f/fxd.rar
#include
#define uint unsigned int
#define uchar unsigned char

    sbit D1=P0^7;

    uchar sr;
uchar jf;

    uchar code table[]={
0,1,2,3,4,5,6,7,8,9,10,
11,12,13,14,15,16,17,18,
19,20,21 ,22,23,24,25,26,27,
28,29,30,31,32,33,34,35,36,
37,38,39,40,41,42,43,44,45,
46 ,47,48,49};

    void light(uchar num);
void delay(uint z);

    void main()
{
//Set the counter
//Select counting mode 1
 TMOD = 0x11;
//Write the initial value to the counter
 TH0 = 0;
 TL0 = 0;
////////////////////
//Operate the microcontroller
//Turn on CPU interrupt
 EA = 1;
/////////////////////
//Turn on timer T0 bit interrupt
 ET0 = 1;
//Turn on counter
 TR0 = 1;
//Operate diode
P1=0;
 while(1)
 {
  if(sr<50)
  light(sr);
  else sr=0;
 }
}
//Subfunction
void light(uchar num)
{
 uchar tme;
 D1 = 0;
 tme = table[num];
 delay(tme);
 D1 = 1;
 delay(49-tme);
}
//Interrupt function
void time () interrupt 1
{
//Increment the independent variable
 if (jf<2)
  {
  jf++;
  TH0 =0;
  TL0 = 0;
  }
 
 if (jf==2)
  {
//Write initial value
  jf=0;
  
  TH0 = 254;
  TL0 = 254;
  sr++;
  } 
}
void delay(uint z)
{
 uint x,y;
 for(x=10;x>0;x--)
  for(y=z;y>0;y--);
}