Rainbow Agar Agar (recipe adapted from the net)

Transparent layer
1 packet (10 gm) agar agar powder
1000 ml water
120g caster sugar 
Pandan leave, knotted

Coconut layer
1 packet (10 gm) agar agar powder
600 ml water
400 ml coconut milk
120g caster sugar
Pandan leave, knotted
1/2 teaspoon salt

Colour for coconut layer (I use gel colouring)
1. 1 tiny drop of red or pink
2. Orange
3. Yellow
4. Green 
5. Sky Blue
6. Purple


Method
Transparent layer

1. bring the 1000ml water with pandan leave to boil then dissolve the agar agar powder into pandan water. Add in sugar & continue stir till sugar well dissolve. Lower the fire to keep mixture warm (stir it occassionally to prevent the mixture to be set).

Coconut layer (for colour)
2. bring the 600ml water with pandan leave to boil then dissolve the agar agar powder into pandan water. Add in sugar & continue stir till sugar well dissolve. Add in 400ml coconut milk & 1/2 teaspoon salt. Lower the fire to keep mixture warm (stir it occassionally to prevent the mixture to be set).

3. Prepare two 1000ml plastic container or any bottles.
4. Use scoop ladle to measure which 1 scoop around 90ml (if using 1000ml container, otherwise measure according to the size of your container or bottles).
5. First layer is the pink coconut layer, let the layer to set 90% before pouring the 2nd layer which is the transparent layer or else when you cut it, the layer will come off. 

Note: The third layer should be orange followed by transparent then yellow and then tranparent and so on. The last layer should be purple. After it's all set, keep it in the fridge and slowly flip it over, you will see the pink layer is on top. If you use bottles, the first layer below about be purple and the last one is pink as you don't have to flip it.