kalman filter prediction state

i want to ask if how to make kalman filter to predict next states from the history of numbers , for example lets say i have the array of measured values like this ... array[1,2,3,4,5,6] what i want to do is to predict next array of numbers like ... [ 1.2,2.1,3.3,4.,5.04,5.9] i want to do something like this.but for me instant of predicting next array is gving me 7 which is the next state.