FOUR RHYMING RIDDLES

1)
It runs and runs, but cannot flee;
It's often watched, but cannot see.

2)
Strung together with a line,
Stuck behind bars, but have done no crime.

3)
It's all about love, but it's always wrong;
It can be right, but it's never wrong.

4)
I come in darkness,
Though not always at night;
To some I bring joy,
To others fright.

Answers:

1. A clock
2. 1/8 or 1/16 musical notes
3. Triangle
4. Dreams