Homemade Photo Emulsion

So i've been wanting to make my own photo emulsion for a while now. I bought the chemicals back in June, (silver nitrate, potassium bromide, potassium iodide, and gelatin) and I just now have gotten around to mixing them together. I had some assistance cutting the glass and I made a small pinhole camera. Each negative is approxemately 4 in. by 4 in. The exposure was 20 minutes long and I used three coats of emulsion. I'm not sure what those spots are. Uneven emulsion perhaps? This pinhole is certainly too large, so I made a new smaller hole. I tried it today. We'll see how it turns out. It's been a tough and exciting process. I can't wait to do more. Hope your all well. See you in a few days.