Soak urad dal for 2 hours and grind like that for idli. Add the gram flour and maida to this and mix. Take small quantities of this flour in several vessels and mix the various food colours in each of them. Make sugar syrup by heating sugar and water in the ratio 1:1. Make it into a thick syrup. Heat oil. Hold the boondhi plate over the oil and gently rub the flour on the boondhi plate so that boondhis are dropped into the oil. Deep fry the boondhis, remove and add it into the sugar syrup.