(( "Well. I made lemon pudding (Vanilla also works) and I put in two drops of blue food dye (Green if you use vanilla). I also used a nine inch graham cracker crust." found it in the comments hope it helps dear uvu ))
I refrigerated it for about half an hour. But mostly because I forgot about it for ten minutes and didn't pull it out until my brother whined at me to pull it out. But it still turned out pretty good. I recommend half an hour.