Answer:
My first keeps time, my second spends time, my whole tells time.
Thousands of these come together to make a digital image. What is it?
It regulates our daily movements, but it feels no interest in our lives. It directs us when to come and go, but does not care if we pay attention. What is it?
My first is nothing but a name; my second is more small; my whole is of so little fame it has no name at all.
Left to right I’m quite bright. Right to left I might bite.
People take me on walks and I run and have fun. What am I?