#include <time.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#define TIME_UP 100
#define TIME_DOWN 700
#define TIME (TIME_UP+TIME_DOWN)

static int nint(double d)
{
 if (d < 0) return(d-.5); else return(d+.5);
}

static void write_sample(int s)
{
 if (s < -32767) s = -32767;
 if (s > 32767) s = 32767;
 putchar((s>>8)&0xff);
 putchar(s&0xff);
}

static double noise(void)
{
 static int didinit = 0;

 if (! didinit)
  { srandom(time(0)+getpid());
    didinit = 1;
  }
 return((((random()&0x00ffffff)/(double)0x00ffffff)-.5)*2);
}

static double volume(int age)
{
 if (age < TIME_UP)
  { return(age/(double)TIME_UP);
  }
 else
  { return((TIME-age)/(double)TIME_DOWN);
  }
}

int main(void);
int main(void)
{
 int i;

 for (i=0;i<TIME;i++)
  { write_sample(nint(noise()*volume(i)*8000));
  }
 exit(0);
}