diff --git a/src/main/java/ma2tetr/App.java b/src/main/java/ma2tetr/App.java
index d143df9..f933a85 100644
--- a/src/main/java/ma2tetr/App.java
+++ b/src/main/java/ma2tetr/App.java
@@ -35,5 +35,6 @@ public class App {
         System.out.println(t.getP1());
         System.out.println(t.getP2());
         System.out.println(t.getP3());
+        System.out.println("Iterations needed: " + calc.getStateLog().size());
     }
 }
diff --git a/src/main/java/ma2tetr/api/ITetrahedronCoordCalculator.java b/src/main/java/ma2tetr/api/ITetrahedronCoordCalculator.java
index f8e4977..bc2bd11 100644
--- a/src/main/java/ma2tetr/api/ITetrahedronCoordCalculator.java
+++ b/src/main/java/ma2tetr/api/ITetrahedronCoordCalculator.java
@@ -1,5 +1,8 @@
 package ma2tetr.api;
 
+import java.util.List;
+
+import ma2tetr.model.IterationState;
 import ma2tetr.model.Tetrahedron;
 
 public interface ITetrahedronCoordCalculator {
@@ -11,5 +14,7 @@ public interface ITetrahedronCoordCalculator {
     void calculate();
 
     Tetrahedron getTetrahedron();
+
+    List<IterationState> getStateLog();
     
 }
diff --git a/src/main/java/ma2tetr/impl/StateLogger.java b/src/main/java/ma2tetr/impl/StateLogger.java
new file mode 100644
index 0000000..5442297
--- /dev/null
+++ b/src/main/java/ma2tetr/impl/StateLogger.java
@@ -0,0 +1,31 @@
+package ma2tetr.impl;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+import ma2tetr.model.Coords3D;
+import ma2tetr.model.IterationState;
+import ma2tetr.model.Vector3D;
+
+public class StateLogger {
+
+    private Coords3D center;
+    private Set<Coords3D> points;
+    private List<IterationState> log;
+
+    public StateLogger(Coords3D center, Set<Coords3D> points, List<IterationState> log) {
+        this.center = center;
+        this.points = points;
+        this.log = log;
+    }
+
+    public void logState() {
+        Set<Coords3D> coords = new HashSet<>();
+        for (Coords3D point : points) {
+            coords.add(Vector3D.createFromPoints(center, point));
+        }
+        log.add(new IterationState(coords));
+    }
+    
+}
diff --git a/src/main/java/ma2tetr/impl/TetrahedronMovingCalculator.java b/src/main/java/ma2tetr/impl/TetrahedronMovingCalculator.java
index a656692..28f2e77 100644
--- a/src/main/java/ma2tetr/impl/TetrahedronMovingCalculator.java
+++ b/src/main/java/ma2tetr/impl/TetrahedronMovingCalculator.java
@@ -1,12 +1,15 @@
 package ma2tetr.impl;
 
+import java.util.ArrayList;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Set;
 
 import ma2tetr.api.ITetrahedronCoordCalculator;
 import ma2tetr.invariant.RadiusInvariant;
 import ma2tetr.invariant.TetrahedronInvariant;
 import ma2tetr.model.Coords3D;
+import ma2tetr.model.IterationState;
 import ma2tetr.model.Point3D;
 import ma2tetr.model.Tetrahedron;
 import ma2tetr.model.Vector3D;
@@ -15,6 +18,7 @@ public class TetrahedronMovingCalculator implements ITetrahedronCoordCalculator
 
     private double radius = 1.0;
     private Tetrahedron tetrahedron = null;
+    private List<IterationState> log = new ArrayList<>();
 
     @Override
     public void setRadius(double radius) {
@@ -32,6 +36,7 @@ public class TetrahedronMovingCalculator implements ITetrahedronCoordCalculator
         points.add(triangle.getP1());
         points.add(triangle.getP2());
         points.add(triangle.getP3());
+        StateLogger logger = new StateLogger(center, points, log);
         RadiusInvariant rinv = new RadiusInvariant(points, center, radius);
         TetrahedronInvariant tinv = new TetrahedronInvariant(top, triangle.getP1(), triangle.getP2(), triangle.getP3());
         double scaling = radius / 10;
@@ -45,6 +50,7 @@ public class TetrahedronMovingCalculator implements ITetrahedronCoordCalculator
                 triangle.move(-scaling);
                 scaling = scaling / 10;
             }
+            logger.logState();
         }
         tetrahedron = new Tetrahedron(top, triangle.getP1(), triangle.getP2(), triangle.getP3());
     }
@@ -58,5 +64,10 @@ public class TetrahedronMovingCalculator implements ITetrahedronCoordCalculator
     public double getRadius() {
         return this.radius;
     }
+
+    @Override
+    public List<IterationState> getStateLog() {
+        return log;
+    }
     
 }
diff --git a/src/main/java/ma2tetr/impl/TetrahedronScalingCalculator.java b/src/main/java/ma2tetr/impl/TetrahedronScalingCalculator.java
index 35a716b..8f74d2d 100644
--- a/src/main/java/ma2tetr/impl/TetrahedronScalingCalculator.java
+++ b/src/main/java/ma2tetr/impl/TetrahedronScalingCalculator.java
@@ -1,9 +1,13 @@
 package ma2tetr.impl;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import ma2tetr.api.ITetrahedronCoordCalculator;
 import ma2tetr.invariant.RadiusInvariant;
 import ma2tetr.invariant.TetrahedronInvariant;
 import ma2tetr.model.Coords3D;
+import ma2tetr.model.IterationState;
 import ma2tetr.model.Tetrahedron;
 import ma2tetr.model.Vector3D;
 
@@ -11,6 +15,7 @@ public class TetrahedronScalingCalculator implements ITetrahedronCoordCalculator
 
     private double radius = 1.0;
     private Tetrahedron tetrahedron = null;
+    private List<IterationState> log = new ArrayList<>();
 
     @Override
     public void setRadius(double radius) {
@@ -21,6 +26,7 @@ public class TetrahedronScalingCalculator implements ITetrahedronCoordCalculator
     public void calculate() {
         Coords3D center = new Vector3D(0, 0, 0);
         tetrahedron = new Tetrahedron(0, radius, 0);
+        StateLogger logger = new StateLogger(center, tetrahedron.getPointsSet(), log);
         TetrahedronInvariant tinv = new TetrahedronInvariant(tetrahedron);
         RadiusInvariant rinv = new RadiusInvariant(tetrahedron.getPointsSet(), center, radius);
         double scaling = radius / 10;
@@ -34,6 +40,7 @@ public class TetrahedronScalingCalculator implements ITetrahedronCoordCalculator
                 tetrahedron.scale(-scaling);
                 scaling = scaling / 10;
             }
+            logger.logState();
         }
     }
 
@@ -47,4 +54,9 @@ public class TetrahedronScalingCalculator implements ITetrahedronCoordCalculator
         return this.radius;
     }
     
+    @Override
+    public List<IterationState> getStateLog() {
+        return log;
+    }
+
 }
diff --git a/src/main/java/ma2tetr/model/IterationState.java b/src/main/java/ma2tetr/model/IterationState.java
new file mode 100644
index 0000000..45b0d91
--- /dev/null
+++ b/src/main/java/ma2tetr/model/IterationState.java
@@ -0,0 +1,17 @@
+package ma2tetr.model;
+
+import java.util.Set;
+
+public class IterationState {
+    
+    Set<Coords3D> points;
+
+    public IterationState(Set<Coords3D> points) {
+        this.points = points;
+    }
+
+    public Set<Coords3D> getPoints() {
+        return points;
+    }
+
+}