#
#
a=Time.now
printf("%d:%d:%d",a.hour,a.min,a.sec)
while true
  b=Time.now
  if b.floor==a.floor+1
    print("\e[2J\e[1;1H")
    printf("%d:%d:%d",a.hour,a.min,a.sec)
    a=b
  end
end