* Gets Number of steps JTextField.
* @return
*/
public TextField getNumberOfStepsField(){
if(numberOfStepsField == null){
numberOfStepsField = new TextField();
numberOfStepsField.setText("1");
numberOfStepsField.setPreferredSize(new Dimension(100, 20));
numberOfStepsField.addKeyListener(new KeyListener(){
public void keyPressed(KeyEvent e) {