JavaFX Animating sprites

MovementController.java

import javafx.animation.AnimationTimer;
import javafx.beans.binding.BooleanBinding;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.fxml.FXML;
import javafx.scene.image.ImageView;
import javafx.scene.input.KeyCode;
import javafx.scene.layout.AnchorPane;

public class MovementController {

    private BooleanProperty wPressed = new SimpleBooleanProperty();
    private BooleanProperty aPressed = new SimpleBooleanProperty();
    private BooleanProperty sPressed = new SimpleBooleanProperty();
    private BooleanProperty dPressed = new SimpleBooleanProperty();

    private BooleanBinding keyPressed = wPressed.or(aPressed).or(sPressed).or(dPressed);

    private int movementVariable = 2;

    private RunningAnimation runningAnimation;

    @FXML
    private ImageView sprite;

    @FXML
    private AnchorPane scene;

    public void makeRunnerMovable(ImageView sprite, AnchorPane scene){
        this.sprite = sprite;
        this.scene = scene;

        movementSetup();
        runningAnimation = new RunningAnimation(sprite);

        keyPressed.addListener(((observableValue, aBoolean, t1) -> {
            if(!aBoolean){
                timer.start();
                runningAnimation.startAnimation();
            } else {
                timer.stop();
                runningAnimation.stopAnimation();
            }
        }));
    }

    AnimationTimer timer = new AnimationTimer() {
        @Override
        public void handle(long timestamp) {

            if(wPressed.get()) {
                sprite.setLayoutY(sprite.getLayoutY() - movementVariable);
            }

            if(sPressed.get()){
                sprite.setLayoutY(sprite.getLayoutY() + movementVariable);
            }

            if(aPressed.get()){
                sprite.setLayoutX(sprite.getLayoutX() - movementVariable);
            }

            if(dPressed.get()){
                sprite.setLayoutX(sprite.getLayoutX() + movementVariable);
            }
        }
    };

    private void movementSetup(){
        scene.setOnKeyPressed(e -> {
            if(e.getCode() == KeyCode.W) {
                wPressed.set(true);
            }

            if(e.getCode() == KeyCode.A) {
                aPressed.set(true);
            }

            if(e.getCode() == KeyCode.S) {
                sPressed.set(true);
            }

            if(e.getCode() == KeyCode.D) {
                dPressed.set(true);
            }
        });

        scene.setOnKeyReleased(e ->{
            if(e.getCode() == KeyCode.W) {
                wPressed.set(false);
            }

            if(e.getCode() == KeyCode.A) {
                aPressed.set(false);
            }

            if(e.getCode() == KeyCode.S) {
                sPressed.set(false);
            }

            if(e.getCode() == KeyCode.D) {
                dPressed.set(false);
            }
        });
    }
}

RunningAnimation.java

import javafx.animation.Animation;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.util.Duration;

import java.io.File;

public class RunningAnimation {

    private ImageView runner;
    int number = 1;

    Timeline timeline = new Timeline(new KeyFrame(Duration.seconds(0.5), event -> {
        if(number == 1){
            runner.setImage(new Image(getFile("sprites/runner2.png").getAbsolutePath()));
            number = 2;
        } else if( number == 2){
            runner.setImage(new Image(getFile("sprites/runner1.png").getAbsolutePath()));
            number = 1;
        }
    }));

    public RunningAnimation(ImageView runner) {
        this.runner = runner;
        timeline.setCycleCount(Animation.INDEFINITE);
    }

    private File getFile(String fileName){
        return new File(getClass().getResource(fileName).getPath());
    }

    public void startAnimation(){
        timeline.play();
    }

    public void stopAnimation(){
        timeline.stop();
    }
}