Here is the procedure:

Take the box and paint it with the Chalk Paint “Bracket Green“.  Make some textures using Modelling Paste and stencil. Spray using brush some Lamp Black Chalk Paint on it. Let it to be dry. For the focal point, I have taken the Victorian Gate from the Papericious 3D Shaker Collection. For the colouring of the window, do the first coat with Gesso and second coat with Natural White Chalk Paint. Put some Crystal Clear Glitter on the wet paint so that it will be fixed with the colour only. Put some Sequins in it and cover it with an OHP sheet. To decorate it with flowers, take Cut & Create Embellishment Sheet "Blush". This collection has beautiful images of flowers, leaves, butterflies, hearts and keys. Do fussy cutting of all the images and make a beautiful composition near the gate. It gives a beautiful vision of a garden window which can make anyone smile. Take the sentiment "Smile" from the "Moments" Collection and colour it with Gesso and White Chalk Paint. To enhance its beauty, put some Crystal Clear on the sentiment. Let it be dry and settled.

Some more pictures: