In a small pot add COLD water, lychee juice, agar agar powder, and whisk until there are no more lumps. Bring to a boil, stirring constantly.
Once boiling, let it boil for a minute or so, until agar agar powder is completely dissolved.
Add sugar and stir until dissolved, then remove from heat and immediately pour about 1/4-inch of the agar into your mold. Place fruit pieces in the mold.
Let the first layer sit until firm, then prepare the coconut layer.
Combine coconut milk, water, agar agar powder in a pot and bring to a boil. Add sugar and a pinch of salt, then remove from heat.
Check if the bottom layer is ready, then GENTLY pour the hot coconut layer on top.
Make the juice layer and let it set on top of the coconut layer. Refrigerate until cold.
Unmold carefully and enjoy!