#include reg52.h>

#includeinstrins.h>

#define uchar unsigned char

#define uint unsigned int

uchar code led[]={0xfe,0xfb,0xfd ,0xf7,0xef,0xbf,0xdf,0x7f};

delay(uint z)

{

uint x,y;

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

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

}

main( )

{

uint i;

while(1)

{

P2=led[];

delay(500);

_crol_(led,1);

}

}