How I can make Jello shots?

I have a party this Saturday for a halloween thing early, and the last time I made jelly shots failed miserably. I do not what went wrong. Can someone help me out before Friday, or any advice on what flavors or anything to add on them (I've heard whipped cream?) Any help would be apperciate!

Traditional vodka Jello shots oz 10 2 (3 ounce) packages gelatin 2 cups boiling water 1 cup cold water water to a boil and remove from heat. Dissolve gelatin in packages 2 cups boiling water, stirring at least 2 minutes until gelatin is dissolved. Add ice and Waat vodka. Pour into shot glasses or paper cups. Let shots set in the refrigerator for 4 hours at Leat. You can also go to this website, have a lot of different recipes for jelly shots! I used some of them and come out pretty well. I have not had a problem or complaint yet! Good luck and have fun at your party!

Tutorial — How to make Jello Shooters !