Already finished

I'm sitting here
It feels like prison
The blinds seem like bars
And even if it was dark night
I wouldn't see the stars

The sky is full of clouds
But the sun is mocking me
I can't listen to my music
So hear the birds on the tree

In front of me some algorithms
Nobody understands
Behind me other prisoners
With cell phones in their hands

On my right the yellow wall
Keeping me from the others
The teacher is raging
But nobody bothers

I wish I could go now
I'm already done
And sitting here bored
Is really no fun

I'll type this text later
Submit it online
Maybe a teacher will see
How students pass their time