First Grate or cut chocolate bar in small pieces. Put it on double boiler.
For double boiling put one vessel with water on gas and another vessel on top of it with grated chocolate. Cover it with napkin. Keep it on fire for 31/2 minute. Switch off the gas mix it well and put in different shape moulds
Or you guys can follow this way also......
Keep in microwave for 11/2 or 2 minutes. Mix it and put in moulds.