private int sec_to_big(int sec)
{
int big = 0;
if (sec / 3 < 2)
{
big = 3;
}
else if (sec / 3 > 2)
{
big = 1;
}
else
{
big = 2;
}
big += (2 - (sec % 3)) * 3;
return big;
}