diff --git a/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building0.java b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building0.java
index 61671f8..b7c5fc4 100644
--- a/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building0.java
+++ b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building0.java
@@ -25,18 +25,22 @@ public class Building0 extends BuildingCard {
     }
 
 
-    public void setSetCards(Player player)
+    public void initialize(Player player)
     {
         if(purchased)
         {
             return;
         }
         HashMap<CharacterType,Integer> map = new HashMap<CharacterType,Integer>();
-        for(CharacterType type : CharacterType.values())
+        for(CharacterType t : CharacterType.values())
         {
-            map.merge(type, 1, Integer::sum);
+            map.put(t, 0);
         }
-
+        for(Character c : player.getCharacterCards())
+        {
+            map.merge(c.getType(), 1, Integer::sum);
+        }
+        numSet= map.values().stream().min(Integer::compareTo).get();
         purchased = true;
 
     }
@@ -45,10 +49,23 @@ public class Building0 extends BuildingCard {
         return new Building0(getEra(),getPrice());
     }
     @Override
-    public void applyEffect(ArrayList<Player> players) {
-        for (Player p : players) {
-            p.addFood(3);
+    public void applyEffect(Player player) {
+        HashMap<CharacterType,Integer> map = new HashMap<CharacterType,Integer>();
+
+        for(CharacterType t : CharacterType.values())
+        {
+            map.put(t, 0);
         }
+        for(Character c : player.getCharacterCards())
+        {
+            map.merge(c.getType(), 1, Integer::sum);
+        }
+        int temp = map.values().stream().min(Integer::compareTo).get();
+        if(temp<=numSet)
+        {
+            return;
+        }
+        player.addFood(5*(temp-numSet));
     };
 
 }
diff --git a/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building1.java b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building1.java
new file mode 100644
index 0000000..4eddc47
--- /dev/null
+++ b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building1.java
@@ -0,0 +1,29 @@
+package it.polimi.ingsw.gc14.Model.Cards.Building.Effects;
+
+import it.polimi.ingsw.gc14.Model.Cards.Building.EffectType;
+import it.polimi.ingsw.gc14.Model.Cards.BuildingCard;
+import it.polimi.ingsw.gc14.Model.Cards.TribeCards.Character;
+import it.polimi.ingsw.gc14.Model.Cards.TribeCards.CharacterType;
+import it.polimi.ingsw.gc14.Model.Player;
+
+import java.util.HashMap;
+
+public class Building1 extends BuildingCard {
+    private CharacterType icon ;
+    public CharacterType getIcon() {return icon;}
+
+    public Building1(int era, int price, CharacterType icon) {
+        super(era,price);
+        effectType= EffectType.ON_EVENT;
+        effectId=1;
+        this.icon=icon;
+    }
+    @Override
+    public BuildingCard clone() {
+        return new Building1(getEra(),getPrice(),getIcon());
+    }
+    @Override
+    public void applyEffect(Player player) {
+    };
+
+}
diff --git a/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building4.java b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building4.java
new file mode 100644
index 0000000..bd3ffea
--- /dev/null
+++ b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/Building/Effects/Building4.java
@@ -0,0 +1,78 @@
+package it.polimi.ingsw.gc14.Model.Cards.Building.Effects;
+
+import it.polimi.ingsw.gc14.Model.Cards.Building.EffectType;
+import it.polimi.ingsw.gc14.Model.Cards.BuildingCard;
+import it.polimi.ingsw.gc14.Model.Cards.TribeCards.Character;
+import it.polimi.ingsw.gc14.Model.Cards.TribeCards.Characters.Inventor;
+import it.polimi.ingsw.gc14.Model.Player;
+
+import java.util.HashMap;
+
+public class Building4 extends BuildingCard {
+
+    boolean purchased ;
+    int numPair;
+    public Building4(int era, int price) {
+        super(era,price);
+        effectType= EffectType.INVENTORPAIR;
+        effectId=4;
+    }
+
+    public void initialize(Player player)
+    {
+        if(purchased)
+        {
+            return;
+        }
+        HashMap<Integer,Integer> map = new HashMap<>();
+        for(int i=0;i<10;i++)
+        {
+            map.put(i,0);
+        }
+
+        for(Character c : player.getCharacterCards())
+        {
+            if(c instanceof Inventor inv)
+            {
+                map.merge(inv.Icon(),1,Integer::sum);
+            }
+        }
+        numPair=0;
+        for(Integer i : map.values())
+        {
+            numPair+=(i%2);
+        }
+        purchased = true;
+
+    }
+    @Override
+    public BuildingCard clone() {
+        return new Building4(getEra(),getPrice());
+    }
+    @Override
+    public void applyEffect(Player player) {
+        HashMap<Integer,Integer> map = new HashMap<>();
+        for(int i=0;i<10;i++)
+        {
+            map.put(i,0);
+        }
+
+        for(Character c : player.getCharacterCards())
+        {
+            if(c instanceof Inventor inv)
+            {
+                map.merge(inv.Icon(),1,Integer::sum);
+            }
+        }
+        int temp=0;
+        for(Integer i : map.values())
+        {
+            temp+=(i%2);
+        }
+        if(temp<= numPair)
+        {
+            return;
+        }
+        player.addFood(3*(temp-numPair));
+    };
+}
diff --git a/src/main/java/it/polimi/ingsw/gc14/Model/Cards/BuildingCard.java b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/BuildingCard.java
index bde9def..056c7bb 100644
--- a/src/main/java/it/polimi/ingsw/gc14/Model/Cards/BuildingCard.java
+++ b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/BuildingCard.java
@@ -30,5 +30,5 @@ public abstract class BuildingCard extends PlayableCard implements Cloneable {
     @Override
     public abstract BuildingCard clone() ;
 
-    public abstract void applyEffect(ArrayList<Player> players);
+    public abstract void applyEffect(Player player);
 }
diff --git a/src/main/java/module-info.java b/src/main/java/module-info.java
index af19c11..99faaf9 100644
--- a/src/main/java/module-info.java
+++ b/src/main/java/module-info.java
@@ -5,6 +5,7 @@ module it.polimi.ingsw.gc14 {
     requires org.controlsfx.controls;
     requires java.rmi;
     requires java.smartcardio;
+    requires it.polimi.ingsw.gc14;
 
     opens it.polimi.ingsw.gc14 to javafx.fxml;
     exports it.polimi.ingsw.gc14;