Green Light Glowing

So, what the hell is your plan?
I don't think I have one at all
Insomnia is destroying me by the day

Staring blankly at a wall
Can't sleep; I tried, after all
I don't know what I'm doing here

There has to be a reason
For the pulsing green light on the walls
That I started to see

I idly stare at this for a minute
Thinking it was my vision
But it kept going on

And when I sat up
The pulsing light was still there
Illuminating those two walls

I don't understand
So I try to look outside
And when I do, the lights fade