Larvae to Cocoon

I don’t know how many of you kept the larvae from last week but I did. When I took the larvae back to my dorm room I found out that the larvae feed off of decaying vegetation. I put an orange peeling into the cup to see what would happen. A day later the larvae started to move slower around the perimeter of the cup and eventually stayed in one spot. I thought that I had killed the larvae due to the acidity in the orange peel, but the larvae was just moving in a slower rate. Two days after the larvae turned into a cocoon. The cocoon is a dark brown color similar to that of a coffee bean. The cocoon is smaller in size from the initial larvae stage, around 5 segments in length. It has been four days since the larvae turned into a cocoon.