Mix the hot water in with the chia seeds. Using hot water causes the chia seeds to absorb the water and swell much faster than tap water--which means your pudding will be done sooner and you can eat sooner!
I mean, that's really the only thing you need to know. Other than that, mix everything together, and let it chill in the refrigerator while you chill with some snacks or dinner.
The chia will make it gel and set into a pudding, and coconut milk will make it creamy, and the pandan will make it delicious.
If you don't have pandan (which you really should get and taste before you die), you can substitute vanilla extract, or almond extract for a different but delightful flavor
Use vanilla extract or almond extract if you don't have pandan (although you REALLY need to try it!)