Identify the graphics commands associated with the specific language you are using. Code 10 instances of a graphic object for each of the buttons on the numeric keyboard according to the required syntax of the language.
Attach to the the graphic objects the code for the graphics method used to draw a rectangle. Specify in this method the position of the upper left corner of each rectangular button, and the width and height of the keypad button. Make sure that the placement position of each button will produce a keypad that is aligned and spaced according to the keypad dimension specifications.
Code 10 "text instances" to store the numerical label for each button. Specify in the arguments of the text instances methods. Assign to the text instances variables the text you want to place over each button, the placement position of the label, and the width and height of the label.
Assign an event listener to each numeric button instance on the keypad with the event listener method that the language supports. Specify the arguments of the event listener method to be the mouse click event, and the function name that contains the commands that will be executed when the specific button is pressed.
Code the function statement for each button. Include in it the closing and opening brackets that signify the beginning and end of the commands that the function will execute.