The clock is repeatedly and loudly conveying a message after every watch and every pehar (a quarter of a day/night, that the time is rolling by).
As the water clock sinks repeatedly, 0 human being! you are also sinking your boat of life with ever increasing sins.
The True Guru is warning you repeatedly from all directions; O unattentive and senseless person! the four pehars of your night-like life are being spent sleeping in ignorance. You seemed to have no shame of your concern.
O living being! be aware, open your eyes with the crowing of the cock, be attentive after attending to your body needs, taste the elixir of love with the Lord. Without relishing the Naam Amrit of beloved Lord's name, one would feel repentant ultimately.