#include<reg52.h>

#include <intrins.h>

#define uint unsigned int

#define uchar unsigned char

uchar temp,num,num1;

sbit beep=P2^3;

void delay(uint);void main()

{

temp=0xfe;

while(1)

{

for(num1=0;num1<3;num1++)

{

for(num=0;num<8;num++)

{

P1=temp;

beep=0;

delay(100);

temp=_crol_(temp,1);

P1=0xff;

beep=1;

delay(100);

}

}

for(num1=0;num1<3;num1++)

{

for(num=0;num<8;num++)

{

P1=temp;

beep=0;

delay(100);

temp=_cror_(temp,1);

P1=0xff;

beep=1;

delay(100);

}

}

while(1);

}

}void delay(uint z)

{

uint x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}自己改一改就行了