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import javafx.application.Application;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.*;
import javafx.scene.layout.GridPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.geometry.Insets;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Text;
import javafx.stage.Stage;
import javafx.scene.input.MouseEvent;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        Group g = new Group();
        //Node super di quasi tutto FX
        ObservableList <Node> lista_gruppo=g.getChildren();


        //commandi abbastanza intuibili
        GridPane gridPane=new GridPane();
        gridPane.setMinSize(600,600);
        gridPane.setAlignment(Pos.CENTER);
        for (int i=0;i<10;i++){
            for(int j=0;j<10;j++){
                Rectangle rettangolo = new Rectangle();
                rettangolo.setWidth(5);
                rettangolo.setHeight(5);
                rettangolo.setOnMouseClicked((MouseEvent event)->rettangolo.setFill(Color.GRAY));
                rettangolo.setFill(Color.BLUE);
                gridPane.add(rettangolo,i,j);
            }
        }

        lista_gruppo.add(gridPane);
        //lista_gruppo.add(cerchio);
        Scene scene = new Scene(g,1920, 1000);
        scene.setFill(Color.AQUAMARINE);

        primaryStage.setTitle("Hello word again");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}