Wash rice and soaked it for 10mins, after 10mins take it in wok and add all whole spices, 1/2 teaspoon shahi biryani essence, salt and required water,  cook till rice done.

Heat oil in pressure cooker add onion and saute till colour change in brown.  Add ginger garlic paste and saute till you get pleasure aroma.

Add tomato, little salt, red chilli powder, turmeric powder, coriander powder, garam masala powder and chicken masala, mix this all ingredients  and cook for 3 minutes on low medium flame.

Add chicken pieces in mixture and mix well, cover the lid and cook till chicken done, cook it on low flame and keep sauteing in between.

Take 2 bowls and take 2 tablespoons cooked rice in each, add 2 tablespoons milk in each, add orange food colour in 1bowl and green food colour in other bowl. keep aside.

Open lid and saute chicken biryani masala if you see the masala dry so add 2 tablespoons whisk curd, no need to add water in it.

Cover chicken masala by cooked rice, cover the lid and cook it for 5minutes on low flame. Switch off the flame. After releasing air from pressure cooker open lid and spread coloured rice which we soaked seperate with milk.