#include <reg51.h>
void delay()
{
unsigned int i;
for(i=0;i<32000;i++) ;
}
void main()
{ int a;
while(a);
{
P1 = 0xfe;
delay();
P1 = 0xfd;
delay();
P1 = 0xfb;
delay();
P1 = 0xf7;
delay();
P1 = 0xef;
delay();
P1 = 0xdf;
delay();
P1 = 0xbf;
delay();
P1 = 0x7f;
delay();
}
}
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