How to fill a rectangle with gradient in corona SDK

Corona has a property called graphics.newGradient(), which will be useful for coloring/filling your rectangle with suitable color gradient.

-- First create the rectangle --

local myRectangle = display.newRect( 0, 0, 200, 200 )

-- Then create the gradient method --

local g = graphics.newGradient(

                            { 255, 255, 255 },     -- This is the first color array

                            { 200, 200, 200 },     -- This is the second color array

                             "down" )                  --[[ This is the gradient direction.

                                                                    Default is "down"

                                                                    Others are "up","right" and "left". --]]

-- Now fill your rectangle with the created gradient as: --

myRectangle:setFillColor( g )