Add graphic class

src/view/Game.fxml

+<?xml version="1.0" encoding="UTF-8"?>
+
+<?import javafx.scene.layout.BorderPane?>
+<?import javafx.scene.layout.GridPane?>
+<?import javafx.scene.layout.HBox?>
+<?import javafx.geometry.Insets?>
+<?import javafx.scene.control.Label?>
+
+
+<BorderPane xmlns:fx="http://javafx.com/fxml" fx:controller="controller.GameController" stylesheets="style.css">
+	<center>
+		<GridPane fx:id="board" alignment="CENTER">
+			<padding>
+				<Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
+			</padding>
+		</GridPane>
+	</center>
+	<bottom>
+		<HBox alignment="CENTER">
+			<Label text="Level : " />
+			<Label fx:id="levelNumber" />
+			<padding>
+				<Insets bottom="10.0" />
+			</padding>
+		</HBox>
+	</bottom>
+</BorderPane>
\ No newline at end of file