Catclock is a modified version of the classic X11 xclock with support for an additional "cat mode". In this mode, the clock displays an animated cat with moving eyes and a swinging tail, inspired by the Kit-Cat clock. The program can also display time in analog and digital formats, similar to the original xclock. It is lightweight and uses standard X Toolkit libraries, making it suitable for minimal X11 environments. This SlackBuild builds the program as "catclock" to avoid conflicts with the system xclock binary. This SlackBuild was generated as a starting point and must be reviewed and adjusted before use or submission.