#include

#define on 0

#define off 1

sbit fm = P2^3;

void delay(unsigned int xms)

{

unsigned int i,j;

for(i=xms;i>0;i--)                      //i=xms????xms??

for(j=112;j>0;j--);

}

void main()

{

while(1)

{

//第一段渐变式鸣笛 20毫秒→200毫秒→500毫秒→1秒→500毫秒→200毫秒→20毫秒→

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = on;

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = on;

fm = off;

delay(1000);

fm = on;

delay(1000);

fm = off;

delay(1000);

fm = off;

delay(1000);

fm = on;

delay(1000);

fm = off;

delay(1000);

fm = off;

delay(1000);

fm = on;

delay(1000);

fm = off;

delay(1000);

fm = off;

delay(1000);

fm = on;

delay(1000);

fm = off;

delay(1000);

fm = off;

delay(1000);

fm = on;

delay(1000);

fm = off;

delay(1000);

fm = on;

delay(1000);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(500);

fm = on;

delay(500);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(200);

fm = on;

delay(200);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

fm = off;

delay(20);

fm = on;

delay(20);

}

}

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