What is that thing?

 

I first noticed it in this picture I had taken for other purposes.

Do you see it?

On the wall by the door?

I took some more pictures of it in the bathroom:

It seems to morph around a bit, but it remains recognizable as it slowly makes its way across the walls. I don't much like to talk with my co-workers about what I find in the staff bathrooms, but I asked around among my co-workers if they had noticed this... thing.

No one had. They looked at me blankly when I spoke of it.

No big deal. It seemed harmless enough. Maybe it was all in my imagination anyway.

Later in the evening, though, I saw it out in the main part of the library. It's not very fast, but it seems to be a steady mover. Give it half an hour and it can cover some distance. That is, assuming it was the same thing I saw in the toilets. It was a lot bigger now.

Later, one came right up over the front desk! Or maybe it was just the same one? I never saw two of them anywhere at the same time. 

I asked a library patron if they saw this green thing.

"What are you talking about?" They asked. "That black pad?"

"No." I replied. "This." I showed them this picture. They just looked at me nervously and wished me a good evening.

I felt better when it worked its way to the counter behind me, but it was always on the move. 

I don't think the thing was up to anything, but I kind of liked knowing where it was.

Then I had to help a family get a few library cards, which can take some time. I thought I saw one of the kids staring at the creature, but when I turned around it was gone.

Then I realized it was clear across the library, and much bigger! I gasped.

"What?" Asked the mother of the children I was getting cards for.

"Oh, nothing." I mumbled.

But I was certain one of the small children was eyeing the thing nervously.

When the mother was distracted with one of their other kids,  I whispered to the child "You see it, don't you?"

The child nodded nervously.

"It's probably fine." I said.

He nodded.

It's probably fine.