diff --git a/QT/scan-line/mywindow.cpp b/QT/scan-line/mywindow.cpp
index 7a62965..9a2be79 100644
--- a/QT/scan-line/mywindow.cpp
+++ b/QT/scan-line/mywindow.cpp
@@ -56,10 +56,6 @@ MyWindow::MyWindow(QWidget *parent) :
     poczX = ui->rysujFrame->x();
     poczY = ui->rysujFrame->y();
 
-    segment_count = ui->segmentSlider->value();
-    QString str(("Ilosc segmentow: " + std::to_string(segment_count)).c_str());
-    ui->segmentLabel->setText(str);
-
     shapes.push_back(Shape());
 
     // Tworzymy obiekt klasy QImage, o odpowiedniej szerokosci
@@ -89,17 +85,6 @@ void MyWindow::on_exitButton_clicked()
     qApp->quit();
 }
 
-
-void MyWindow::on_segmentSlider_valueChanged(int val)
-{
-    segment_count = val;
-    QString str(("Ilosc segmentow: " + std::to_string(segment_count)).c_str());
-    ui->segmentLabel->setText(str);
-    DrawShapes();
-    update();
-}
-
-
 // Funkcja "odmalowujaca" komponent
 void MyWindow::paintEvent(QPaintEvent*)
 {
@@ -305,9 +290,10 @@ void MyWindow::DrawShapes(){
             DrawLine(p1.x, p1.y, p2.x, p2.y, img);
         }
         std::vector<Line> lines;
-        for(int j = 0; j < (int)shapes[i].points.size() - 1; j++){
+        int points_n = (int)shapes[i].points.size();
+        for(int j = 0; j < points_n; j++){
             Point p1 = shapes[i].points[j];
-            Point p2 = shapes[i].points[j+1];
+            Point p2 = j == points_n - 1 ? shapes[i].points[0] : shapes[i].points[j+1];
             lines.push_back(Line(p1, p2));
         }
         for(int y = 0; y < wys; y++){
@@ -325,9 +311,7 @@ std::vector<int> MyWindow::GetIntersectionsWithY(int y, std::vector<Line> lines)
         Line l = lines[i];
         if(l.A.x < l.B.x)
             std::swap(l.A, l.B);
-//        if(l.A.x < l.B.x)
-//            std::swap(l.A, l.B);
-        if((l.A.y < y && l.B.y > y) || (l.A.y > y && l.B.y < y)){
+        if((l.A.y <= y && l.B.y > y) || (l.A.y > y && l.B.y <= y)){
             float d1 = (y - l.A.y);
             float d2 = (l.B.y - l.A.y);
             float dx = (l.B.x - l.A.x);
@@ -336,7 +320,7 @@ std::vector<int> MyWindow::GetIntersectionsWithY(int y, std::vector<Line> lines)
             res.push_back(x);
         }
     }
-    std::sort(res.begin(), res.end(), std::greater<int>());
+    std::sort(res.begin(), res.end(), std::less<int>());
     return res;
 }
 
diff --git a/QT/scan-line/mywindow.h b/QT/scan-line/mywindow.h
index 2634fc7..8954979 100644
--- a/QT/scan-line/mywindow.h
+++ b/QT/scan-line/mywindow.h
@@ -155,7 +155,6 @@ private:
 private slots:
     void on_cleanButton_clicked();
     void on_exitButton_clicked();
-    void on_segmentSlider_valueChanged(int val);
     void mousePressEvent(QMouseEvent *event);
     void mouseMoveEvent(QMouseEvent *event);
     void paintEvent(QPaintEvent*);
diff --git a/QT/scan-line/mywindow.ui b/QT/scan-line/mywindow.ui
index 35bbc7c..e3d6a20 100644
--- a/QT/scan-line/mywindow.ui
+++ b/QT/scan-line/mywindow.ui
@@ -42,7 +42,7 @@
       <x>630</x>
       <y>10</y>
       <width>241</width>
-      <height>331</height>
+      <height>211</height>
      </rect>
     </property>
     <property name="title">
@@ -74,60 +74,19 @@
       <string>Wyjście</string>
      </property>
     </widget>
-    <widget class="QSlider" name="segmentSlider">
-     <property name="geometry">
-      <rect>
-       <x>10</x>
-       <y>150</y>
-       <width>221</width>
-       <height>20</height>
-      </rect>
-     </property>
-     <property name="minimum">
-      <number>1</number>
-     </property>
-     <property name="maximum">
-      <number>100</number>
-     </property>
-     <property name="value">
-      <number>10</number>
-     </property>
-     <property name="orientation">
-      <enum>Qt::Horizontal</enum>
-     </property>
-     <property name="tickPosition">
-      <enum>QSlider::TicksAbove</enum>
-     </property>
-     <property name="tickInterval">
-      <number>10</number>
-     </property>
-    </widget>
-    <widget class="QLabel" name="segmentLabel">
-     <property name="geometry">
-      <rect>
-       <x>10</x>
-       <y>120</y>
-       <width>131</width>
-       <height>20</height>
-      </rect>
-     </property>
-     <property name="text">
-      <string>TextLabel</string>
-     </property>
-    </widget>
     <widget class="QLabel" name="label">
      <property name="geometry">
       <rect>
        <x>10</x>
-       <y>186</y>
+       <y>100</y>
        <width>221</width>
-       <height>131</height>
+       <height>101</height>
       </rect>
      </property>
      <property name="text">
       <string>Naciśnij lewy przycisk myszy by utworzyć punkt.
 Przytrzymaj lewy przycisk myszy przy punkcie by go przesunąć.
-Naciśnij prawy przycisk myszy przy punkcie by go usunąć</string>
+Naciśnij na pierwszy punkt figury aby ją zamknąć</string>
      </property>
      <property name="textFormat">
       <enum>Qt::PlainText</enum>