<human>: Can you give me a shortened version of the text?

So, I was in summer school. My teacher had a tendency of picking on me and telling me things. 

One morning my teacher decided to comment on me being in summer school and said, "I can understand why you're here, you are so slow and don't know anything." Of course i took that to offense, but i decided not to say anything and continued working.
About an hour later she asked me to go get her some coffee, I got up and went to the teachers lounge. When I got there I noticed no one was around. Remembering what my teacher said I decided to get revenge. I found some food coloring laying around (I think someone was making cake, idk) I put about 10 drops into her coffee, took some scissors and traced the circle at the bottom of the cup (it was Styrofoam) making it really weak. 

I went back to my classroom and handed my teacher the cup, i sat down and went back to work. A few moments later I heard a gasp, I smirked to myself as I saw the blue and brown mixture all over my teachers shirt and pants. The best part is she had her phone in her bra and proceeded to get that wet too.
<bot>: Teacher called me dumb, put food coloring in her coffe, fucked her cup up. Ruined her clothes and phone.