if(Key2==0)
{
delay(10);
if(Key2==1)
break;
while(Key2==0) ;
k++;
if(k==9)
k=1;
}
switch(k)
{
case 1:P3=0xfd;
break;
case 2:P3=0xfb;
break;
case 3:P3=0xf7;
break;
case 4:P3=0xef;
break;
case 5:P3=0xdf;
break;
case 6:P3=0xbf;
break;
case 7:P3=0x7f;
break;
case 8:P3=0xfe;
break;
default:
;
}