diff --git a/OOP_D7_Project/src/backend/Teleporter.java b/OOP_D7_Project/src/backend/Teleporter.java
index 7dcf792..30ad691 100644
--- a/OOP_D7_Project/src/backend/Teleporter.java
+++ b/OOP_D7_Project/src/backend/Teleporter.java
@@ -1,14 +1,17 @@
 package backend;
 
+//This class is here to deal with the border. We have two state, closed and loop.
+//When we select loop the cell will take into account the state of the cell at the opposite of the grid. 
+
 public class Teleporter {
 	private int size = 0;
 	public Teleporter(int size) {
 		this.size = size;		
 	}
 	public int position(int value, boolean loop) {
-		int out = 0;
-		if (loop) {
-			if (value>=0) {
+		int out = 0; 
+		if (loop) { // verify if we have clicked on the loop option
+			if (value>=0) { 
 				out = value;
 				if (out>=size) {
 					out = out - size;