Add start of working items;

src/main/java/com/yes/yes/behaviours/ItemBehaviour.java

@@ -0,0 +1,45 @@
+package com.yes.yes.behaviours;
+
+import com.yes.yes.utils.BlockContainer;
+import com.yes.yes.utils.Component;
+import com.yes.yes.utils.Entity;
+import com.yes.yes.utils.Item;
+import javafx.geometry.Pos;
+import javafx.scene.layout.VBox;
+import javafx.scene.transform.Scale;
+
+public class ItemBehaviour extends Component {
+
+    private VBox itemGroup;
+    private Item item;
+
+    public ItemBehaviour(Entity entity, BlockContainer blockContainer) {
+        super(entity, blockContainer);
+    }
+
+    private void itemChanged(Item item) {
+        if(this.item != null) {
+            this.itemGroup.getChildren().clear();
+        }
+        this.item = item;
+
+        this.itemGroup.getChildren().add(item);
+    }
+
+    @Override
+    public void initialize() {
+        parent.addListener("itemChanged", this::itemChanged);
+
+        itemGroup = new VBox();
+        itemGroup.setAlignment(Pos.CENTER);
+
+        this.parent.getChildren().add(itemGroup);
+
+        Scale s = new Scale(0.7, 0.7);
+        itemGroup.getTransforms().add(s);
+    }
+
+    @Override
+    public void update() {
+    }
+}

src/main/java/com/yes/yes/behaviours/PlaceBehaviour.java

@@ -24,13 +24,6 @@ public class PlaceBehaviour extends Component {
                 }
             }
         }
-        Item item = new Item();
-        for (int i = 0; i < 4; i++) {
-            for (int i1 = 0; i1 < 4; i1++) {
-                item.setPart(i, i1, new Square());
-            }
-        }
-        //  parent.getChildren().add(item);
     }
 
     @Override

src/main/java/com/yes/yes/behaviours/TestOffererBehaviour.java

@@ -0,0 +1,43 @@
+package com.yes.yes.behaviours;
+
+import com.yes.yes.utils.BlockContainer;
+import com.yes.yes.utils.Component;
+import com.yes.yes.utils.Coordinate;
+import com.yes.yes.utils.Entity;
+
+public class TestOffererBehaviour extends Component {
+
+    private Entity reciever;
+
+    public TestOffererBehaviour(Entity entity, BlockContainer blockContainer) {
+        super(entity, blockContainer);
+    }
+
+    private void placed(Entity entity) {
+        try {
+            if (blockContainer.getBlock(new Coordinate(1, 0)) == entity) {
+                this.reciever = entity;
+            }
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void initialize() {
+        try {
+            this.reciever = blockContainer.getBlock(new Coordinate(1, 0));
+        } catch (IllegalAccessException e) {
+            e.printStackTrace();
+        }
+
+        this.parent.addListener("placed", this::placed);
+    }
+
+    @Override
+    public void update() {
+        if(reciever == null) return;
+
+        reciever.trigger("offerItem", someItem);
+    }
+}

src/main/java/com/yes/yes/entities/machines/TestMachine.java

@@ -1,5 +1,6 @@
 package com.yes.yes.entities.machines;
 
+import com.yes.yes.behaviours.ItemBehaviour;
 import com.yes.yes.behaviours.PlaceBehaviour;
 import com.yes.yes.behaviours.TestBehaviour;
 import com.yes.yes.utils.BlockContainer;
@@ -9,12 +10,16 @@ import javafx.scene.shape.Circle;
 public class TestMachine extends Entity {
     public TestMachine() {
         super();
-        this.getChildren().add(new Circle(25));
+        Circle c = new Circle(25);
+        c.setCenterX(25);
+        c.setCenterY(25);
+        this.getChildren().add(c);
     }
 
     public TestMachine(BlockContainer blockContainer) {
         this();
         this.addBehaviour(new PlaceBehaviour(this, blockContainer));
         this.addBehaviour(new TestBehaviour(this, blockContainer));
+        this.addBehaviour(new ItemBehaviour(this, blockContainer));
     }
 }

src/main/java/com/yes/yes/entities/machines/TestMachine2.java

@@ -1,5 +1,6 @@
 package com.yes.yes.entities.machines;
 
+import com.yes.yes.behaviours.ItemBehaviour;
 import com.yes.yes.behaviours.PlaceBehaviour;
 import com.yes.yes.behaviours.TestBehaviour;
 import com.yes.yes.utils.BlockContainer;
@@ -16,5 +17,6 @@ public class TestMachine2 extends Entity {
         this();
         this.addBehaviour(new PlaceBehaviour(this, blockContainer));
         this.addBehaviour(new TestBehaviour(this, blockContainer));
+        this.addBehaviour(new ItemBehaviour(this, blockContainer));
     }
 }

src/main/java/com/yes/yes/entities/parts/Square.java

@@ -5,9 +5,9 @@ import javafx.scene.shape.Rectangle;
 
 public class Square extends com.yes.yes.utils.Part {
     public Square() {
-        var rect = new Rectangle(25, 25);
+        var rect = new Rectangle(23, 23);
         rect.setFill(Color.RED);
-        rect.setStroke(Color.BLACK);
+        rect.setStroke(Color.BLUE);
         rect.setStrokeWidth(1);
         this.getChildren().add(rect);
     }

src/main/java/com/yes/yes/utils/Item.java

@@ -1,5 +1,7 @@
 package com.yes.yes.utils;
 
+import javafx.scene.transform.Scale;
+
 public class Item extends javafx.scene.Group {
     final Part[][] parts = new Part[4][4];
 
@@ -12,6 +14,9 @@ public class Item extends javafx.scene.Group {
             this.getChildren().remove(parts[layer][section]);
         }
 
+        part.rotate(section);
+
+        part.getTransforms().add(new Scale(-layer*0.25f+1f, -layer*0.25f+1f));
 
         parts[layer][section] = part;
         this.getChildren().add(part);

src/main/java/com/yes/yes/utils/Part.java

@@ -1,5 +1,6 @@
 package com.yes.yes.utils;
 
+import com.yes.yes.world.Chunk;
 import javafx.scene.Node;
 
 public abstract class Part extends javafx.scene.Group {
@@ -14,6 +15,7 @@ public abstract class Part extends javafx.scene.Group {
     public void rotate(int quarters) {
 
         this.getTransforms().clear();
-        this.getTransforms().add(new javafx.scene.transform.Rotate(quarters % 4 * 90, 1, 1));
+        this.getTransforms().add(new javafx.scene.transform.Rotate(quarters % 4 * 90, 0, 0));
     }
+
 }