빨간불 노란불

[히히(121.140)]

#include<stdio.h>


main()
{
   int r = 0;
   int y = 0;
   int yy = 1;
   int rr = 10;

   while("ry"){
      printf("%c   %c\n", r++?' ':'r', y++?' ':'y');
      usleep(200000);
      y=y>yy?0:y;
      yy+=y?0:1;
      yy=yy>15?1:yy;
      r=r>rr?0:r;
      rr-=r?0:1;
      rr=rr<1?10:rr;

   }
}