Black vs Clock

Black

Black in dreams represents the unknown, the unconscious, mystery, and potential. It can be frightening (darkness) or elegant (black clothing). In dream work, blackness often represents what has not yet been brought to consciousness — vast potential waiting to be discovered.

Clock

Clocks represent your relationship with time — the most universal human concern. A clock ticking loudly suggests time pressure and deadlines. A stopped clock may indicate feeling that time has stopped or that you're wasting time. Clock hands spinning rapidly reflect the feeling that time is moving too fast. The specific time shown on a clock may carry personal significance.

Black

Represents the unconscious mind and everything not yet known to the dreamer

Clock

Reflects the modern preoccupation with time and the existential awareness of mortality