diff --git a/src/main/java/Presenter/Algorithms/TheilSenEstimator.java b/src/main/java/Presenter/Algorithms/TheilSenEstimator.java
index 9ad9a2e..3f4a767 100644
--- a/src/main/java/Presenter/Algorithms/TheilSenEstimator.java
+++ b/src/main/java/Presenter/Algorithms/TheilSenEstimator.java
@@ -49,6 +49,8 @@ public class TheilSenEstimator extends Observable implements Algorithm {
     private Double slope;
     private Double yInterception;
 
+    private final Double EPSILON = 0.00001;
+
 
     public TheilSenEstimator(LinkedList<Line> setOfLines, LinkedList<Point> setOfIntersections, Presenter presenter) {
         this.presenter = presenter;
@@ -88,7 +90,7 @@ public class TheilSenEstimator extends Observable implements Algorithm {
         interval = new Interval(NEGATIV_INF, POSITIV_INF);
         r = (double) n;
         while (true) {
-            if (this.N <= n || (interval.getUpper() - interval.getLower()) < 0.00001) {
+            if (this.N <= n || (interval.getUpper() - interval.getLower()) < EPSILON) {
                 break;
             } else {
                 //Anzahl der Schnittpunkte im Intervall [-Inf, a)
diff --git a/src/main/java/Presenter/Generator/DatasetGenerator.java b/src/main/java/Presenter/Generator/DatasetGenerator.java
index f6650a2..32bdb05 100644
--- a/src/main/java/Presenter/Generator/DatasetGenerator.java
+++ b/src/main/java/Presenter/Generator/DatasetGenerator.java
@@ -2,6 +2,8 @@ package Presenter.Generator;
 
 import Model.Line;
 
+import Model.Point;
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.Observable;
@@ -77,10 +79,10 @@ public class DatasetGenerator extends Observable{
             }
         }
 
-        int idx = 1;
+        int idx = lines.size();
         for (Double d :points.keySet()) {
             Line line = new Line((double) d, points.get(d));
-            line.setId(idx-1+"");
+            line.setId(idx+"");
             lines.add(line);
             idx++;
         }
@@ -93,5 +95,35 @@ public class DatasetGenerator extends Observable{
         return lines;
     }
 
+
+    public LinkedList<Line> generateCircle() {
+        LinkedList<Line> lines = new LinkedList<>();
+
+        double from = 0;
+        double to = Math.PI * 3;
+        int n = 100;
+
+        //calculate the distance between every two points
+        double distance = (to - from) / ((double) n);
+
+        //create points
+        double currentDistance= from;
+        for(int i=0; i < n; i++)
+        {
+            double x = Math.cos(currentDistance);
+            double y = Math.sin(currentDistance);
+
+
+            Line line = new Line(x,y);
+            line.setId(i+"");
+            lines.add(line);
+
+            //distance for the next iteration
+            currentDistance += distance;
+        }
+
+        return lines;
+    }
+
 }
 
diff --git a/src/main/java/Presenter/Presenter.java b/src/main/java/Presenter/Presenter.java
index 15c519f..47cb4bc 100644
--- a/src/main/java/Presenter/Presenter.java
+++ b/src/main/java/Presenter/Presenter.java
@@ -294,7 +294,7 @@ public class Presenter implements Observer {
       generatorThread = new Thread(() -> {
         DatasetGenerator generator = new DatasetGenerator();
         generator.addObserver(this);
-        getModel().setLines(generator.generateDataLines());
+        getModel().setLines(generator.generateCircle());
         calculateIntersections();
         getView().enableFunctionality();
       });