1 1/2 oz of Smirnoff vodka (or Vodka)
3 oz of sweet and sour mix
2 oz of Midori melon liqueur (or watermelon liqueur)
7-up soda (or Sprite)
Mix ingredients listed above in the order stated. The best way to gauge if you've done it correctly is by color. It'll look like what it's called and it will taste like gummi worms.