Christmas Layered Jello

I made this Jello salad for a potluck we had planned to have on Thursday, which was cancelled due to the crazy weather. So we had this lovely salad all to ourselves. I got this recipe from my sister as she served it one Christmas Eve.
CHRISTMAS JELLO LAYERED SALAD
1 (3oz) pkg. lime Jello
1 (3oz) pkg. lemon Jello
1 (3oz) pkg. strawberry Jello
1 regular size Cool Whip
1 small can crushed pineapple (drained)
Approximately 20 miniature marshmallows
1 (8oz) pkg. cream cheese
1 c. nuts, chopped (optional)

Bottom layer: Mix lime Jello, 1 cup hot water and 3/4 cup cold water. Pour in serving bowl and refrigerate until firm. Middle Layer: Mix lemon Jello, 1 cup hot water and 3/4 cup cold water. When thickened, in a separate bowl mix Cool Whip, pineapple, marshmallows, cream cheese and nuts. Make sure cream cheese is completely incorporated. Add to lemon Jello and carefully spoon on lime layer. Top layer: Mix strawberry Jello, 1 cup hot water and 3/4 cup cold water. When thickened, carefully spoon on other layers. Refrigerate until set. Looks best in a glass bowl so that you can see all the layers.