Cartoon Cowpie Animation for website

I created an illustration of a cow that we are using on our website. We would like to take the illustration and have it turned into a short animated clip with the cow doing the following: Cow shown walking out onto the field - roaming around and finding a square, Tail goes up and a plop of money lands on a square- Then a message appears- Reserve your Cow Pie Bingo Square- and the date / time etc. For the final product I would like the ability to be able to modify the date, time, etc. part. Thus ideally a flash .fla file could be provided in the end. I have uploaded the cow illustration I have done. I would like this cow to be used as the basis for the animation.