Vadam should be perfectly dried otherwise you will not get that exact vathals after frying.
I have used medium sized sago for making this vadams.
Instead of using cloth you can use polythene sheets which will easily come out after drying.
I have not used any colours to make this as colourful vadams.
You can add some cumin seeds too while making this vadagams.
The sago should be cooked to perfection before drying these vadams.