Sabse pehle ek serving glass me lemon juice dale.

Ab usme mango juice half dale.

Ab ek glass me soda water dale.usme blue food colour dale mix karein.

Ab ek spoon ki help se mango juice me soda water ko spoon ki help se slowly slowly glass ki sides me dale.(note ye bhot important hai ki ap glass me jab soda water dale tb spoon se sides me dale nahi to layer disturb ho jayegi aur dekhne me acha nahi lgega)