缘由https://ask.csdn.net/questions/7910657
cpp
#include "reg52.h"
void main()
{//缘由https://ask.csdn.net/questions/7910657
unsigned char ys=0,sy=0,yy=0,x=0,tcs[]={1,2,4,8,16,32,64,128,3,6,12,24,48,96,192,7,14,28,56,112,224,255};
while(1)
{
if(++ys==0)if(++sy==0)if(++yy>4)
{
P1=255-tcs[x];
if(x<21)++x;yy=0;
}
}
}

我以此施,不求人天无常,愿真正无上道成。