Stained Glass Cake

This recipe is very good, we served it at our church christmas party and they loved it! Recipe is courtesy of Cooks Country magazine.
Ingredients:
12 Graham crackers, crushed to fine crumbs (about 1 1/2 cups)
3/4 cup sugar
5 tablespoons unsalted butter, melted and cooled slightly
3 (3-ounce) boxes Jell-O
4 1/2 cups boiling water
3/4 cup pineapple juice
1 envelope unflavored gelatin
2 cups heavy cream
1 teaspoon vanilla extract
1/8 teaspoon salt

For the crust: Adjust oven rack to middle position and heat oven to 325 degrees. Stir cracker crumbs, 1/4 cup sugar, and butter in bowl until crumbs resemble wet sand. Press into bottom of 9-inch springform pan and bake until edges are golden brown, 12 to 15 minutes. Cool on wire rack.
For the filling: In 3 seperate large bowls, whisk each box of Jell-O with 1 1/2 cups boiling water until dissolved. Pour into 3 loaf pans or pie plates and refrigerate until set, about 4 hours. Once Jell-O has solidified, cut into 1/2 inch cubes and keep chilled. Combine 1/4 cup pineapple juice and unflavored gelatin in bowl. Microwave, stirring occasionally, until gelatin is dissolved, 1 to 3 minutes. Slowly whisk in remaning pineapple juice. With electric sand mixer set on medium-high speed, whip cream, vanilla,salt, and remaining sugar until stiff peaks form, about 3 minutes. Reduce speed to low and slowly add juice mixture until combined. Gently fold Jell-O cubes into cream mixture. Scrape into prepared pan and referigate until set, at least 4 hours or up to 2 days.