Line the bottom of an 8x8 pan with parchment paper. Add a little cooking spray

In a saucepan over medium heat, combine the Lemon jell-O and 18 oz of yogurt until Jell-O is completely dissolved

Empty the Yellow mixture into the bottom of the 8x8 pan. Place in the fridge to set up for about 20 minutes.

For the orange layer: combine 24 oz of yogurt (4 x 6 oz) and 1 box of Orange Jell-O in a saucepan over medium heat until Jell-O is completely dissolved.

Empty the orange mixture on top of the yellow layer. Place in the fridge to set up for about 20 minutes

For the last layer (white) combine 12 oz of yogurt and 1 envelope of gelatin in a saucepan over medium heat and combine until gelatin dissolves completely

Pour on top of the orange layer and let it set up for approximately 20 minutes in the fridge

When the mixture sets up completely unmold using the parchment paper, cut into squares and enjoy!