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#include<reg51.h>
unsigned char tab[6] = {0x00,0x00,0xff,0x81,0x42,0x3c,0x00,0x00}
void main(){
unsigned char i,k;
while(1){
P0 = 0xfe;
P1 = tab[1];
for (k=0;k<6,k++){
P1 = tab[k];
for (i=0,i<50,i++);
P0 = P0<<1|0x01;
}
}
}