Writer's block

Is it like staring straight up into the ticking clock? 

Or not noticing the purple petunias while going for a walk.

Is your brain under lock where the ideas don't flock ?

Is it being devoid of words to describe the plumage of birds?

Is it like making your face frown while you're actually a clown .

Or is it taking so much time to find that one word to rhyme?