Pineapple Icebox Cake

1 box yellow cake mix
1 (20oz) can pineapple
1 cup sugar
13oz pkg vanilla instant pudding
1/2 cup coconut
2 1/2 - 3 cup Cool Whip
Chopped Walnuts

Bake cake according to directions in 9x13 pan.  After baking punch holes in cake with a fork.
Heat pineapple juice and sugar til melted.  Pour over cake.  Let cool.  Prepare pudding
according to directions and add coconut.  Spread pudding on cooled cake, then the
pineapple, then the Cool Whip.  Sprinkle iwth the nuts.  Refrigerate 24 hours.