diff --git a/main/Main.java b/main/Main.java
index c249a5b..df6ebd3 100644
--- a/main/Main.java
+++ b/main/Main.java
@@ -1,22 +1,12 @@
 package main;
 
-
-import org.graphstream.graph.*;
-import org.graphstream.graph.implementations.*;
-
+import structure.Grid;
 
 public class Main {
 
 	public static void main(String[] args) {
-		Graph graph = new SingleGraph("Tutorial 1");
-
-		graph.addNode("A");
-		graph.addNode("B");
-		graph.addNode("C");
-		graph.addEdge("AB", "A", "B");
-		graph.addEdge("BC", "B", "C");
-		graph.addEdge("CA", "C", "A");
-
-		graph.display();
+		Grid g=new Grid();
+		
+		g.printGrid();
 	}
 }
diff --git a/structure/Grid.java b/structure/Grid.java
index cdf21f4..042d41c 100644
--- a/structure/Grid.java
+++ b/structure/Grid.java
@@ -1,5 +1,123 @@
 package structure;
 
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Random;
+
+import javafx.util.Pair;
+
 public class Grid {
 
+	
+	
+	private ArrayList<Router> grid=new ArrayList<>();
+	private ArrayList<ArrayList<Integer>> links=new ArrayList<>();
+	
+	private Random rand = new Random();
+	
+	/**
+	 * Build a 3x3 Grid
+	 */
+	public Grid(){
+			
+		// Build Grid
+		for(int i=0;i<9;i++){
+			this.grid.add(new Router());
+		}
+		
+		// First line
+		this.buildLinkWithRandomWeight(grid.get(0), grid.get(1));
+		this.buildLinkWithRandomWeight(grid.get(1), grid.get(2));
+
+		// Second line
+		this.buildLinkWithRandomWeight(grid.get(3), grid.get(4));
+		this.buildLinkWithRandomWeight(grid.get(4), grid.get(5));
+		
+		// Third line
+		this.buildLinkWithRandomWeight(grid.get(6), grid.get(7));
+		this.buildLinkWithRandomWeight(grid.get(7), grid.get(8));
+		
+		// First column
+		this.buildLinkWithRandomWeight(grid.get(0), grid.get(3));
+		this.buildLinkWithRandomWeight(grid.get(3), grid.get(6));
+		
+		// Second column
+		this.buildLinkWithRandomWeight(grid.get(1), grid.get(4));
+		this.buildLinkWithRandomWeight(grid.get(4), grid.get(7));
+		
+		// Third column
+		this.buildLinkWithRandomWeight(grid.get(2), grid.get(5));
+		this.buildLinkWithRandomWeight(grid.get(5), grid.get(8));
+
+	}
+	
+	
+	private void buildLinks(){
+		
+		// Link1
+		ArrayList<Integer> link1=new ArrayList<>();
+		link1.add(0);link1.add(1);link1.add(2);link1.add(5);link1.add(4);link1.add(3);link1.add(6);link1.add(7);link1.add(8);
+		this.links.add(link1);
+		
+		// Link2
+		ArrayList<Integer> link2=new ArrayList<>();
+		link2.add(0);link2.add(1);link2.add(2);link2.add(5);link2.add(4);link2.add(7);link2.add(8);
+		this.links.add(link2);
+		
+		// link3
+		ArrayList<Integer> link3=new ArrayList<>();
+		link3.add(0);link3.add(1);link3.add(2);link3.add(5);link3.add(8);
+		this.links.add(link3);
+		
+		// link4
+		ArrayList<Integer> link4=new ArrayList<>();
+		link4.add(0);link4.add(1);link4.add(4);link4.add(5);link4.add(8);
+		this.links.add(link4);
+		
+		// link5
+		ArrayList<Integer> link5=new ArrayList<>();
+		link5.add(0);link5.add(3);link5.add(4);link5.add(5);link5.add(8);
+		this.links.add(link5);
+		
+		// link6
+		ArrayList<Integer> link6=new ArrayList<>();
+		link6.add(0);link6.add(3);link6.add(4);link6.add(7);link6.add(8);
+		this.links.add(link6);
+		
+		// link7
+		ArrayList<Integer> link7=new ArrayList<>();
+		link7.add(0);link7.add(3);link7.add(6);link7.add(7);link7.add(8);
+		this.links.add(link7);
+		
+		// link8
+		ArrayList<Integer> link8=new ArrayList<>();
+		link8.add(0);link8.add(3);link8.add(6);link8.add(7);link8.add(4);link8.add(5);link8.add(8);
+		this.links.add(link8);
+		
+		// link9
+		ArrayList<Integer> link9=new ArrayList<>();
+		link9.add(0);link9.add(3);link9.add(6);link9.add(7);link9.add(4);link9.add(1);link9.add(2);link9.add(5);link9.add(8);
+		this.links.add(link9);
+		
+		// link10
+		ArrayList<Integer> link10=new ArrayList<>();
+		link10.add(0);link10.add(3);link10.add(4);link10.add(1);link10.add(2);link10.add(5);link10.add(8);
+		this.links.add(link10);
+		
+		// link11
+		ArrayList<Integer> link11=new ArrayList<>();
+		link11.add(0);link11.add(1);link11.add(4);link11.add(3);link11.add(6);link11.add(7);link11.add(8);
+		this.links.add(link11);
+	}
+	
+	
+	private void buildLinkWithRandomWeight(Router router1, Router router2){
+		router1.buildLink(router2, rand.nextInt(50));
+	}
+	
+	
+	
+
+	
+	
 }
diff --git a/structure/Router.java b/structure/Router.java
new file mode 100644
index 0000000..d0f5ed0
--- /dev/null
+++ b/structure/Router.java
@@ -0,0 +1,27 @@
+package structure;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+
+public class Router {
+
+	
+	private HashMap<Router,Integer> links=new HashMap<>();
+	
+	public Router() {
+		// TODO Auto-generated constructor stub
+	}
+
+	public void buildLink(Router router, int weight){
+		this.links.put(router, weight);
+		router.addLink(this, weight);
+	}
+	
+	public void addLink(Router router, int weight){
+		this.links.put(router, weight);
+	}
+	
+	public int getWeight(Router router){
+		return this.links.get(router);
+	}
+}