I can not remove the clock that is on my desktop.

I have a power book G4 with OS 10.3.9. A few months a go I put a clock on my desktop. It is an analog clock and I want to remove it from my desktop, but I cannot. When I open the clock from the menu, another clock comes to my desktop and when I quit it, it disappears from desktop, but still I have that analog clock. Is there anybody that can tell me how can I remove this clock? I appreciate your help.