diff --git a/QtCurvesCpp.pro.user b/QtCurvesCpp.pro.user
index 3ff9845..35a182d 100644
--- a/QtCurvesCpp.pro.user
+++ b/QtCurvesCpp.pro.user
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 4.3.1, 2017-08-28T10:09:40. -->
+<!-- Written by QtCreator 4.3.1, 2017-08-28T19:37:00. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>
@@ -282,14 +282,17 @@
      <value type="int">13</value>
      <value type="int">14</value>
     </valuelist>
-    <value type="int" key="PE.EnvironmentAspect.Base">-1</value>
+    <value type="int" key="PE.EnvironmentAspect.Base">2</value>
     <valuelist type="QVariantList" key="PE.EnvironmentAspect.Changes"/>
-    <value type="QString" key="ProjectExplorer.CustomExecutableRunConfiguration.Arguments"></value>
-    <value type="QString" key="ProjectExplorer.CustomExecutableRunConfiguration.Executable"></value>
-    <value type="QString" key="ProjectExplorer.CustomExecutableRunConfiguration.WorkingDirectory">%{buildDir}</value>
-    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Custom Executable</value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">QtCurvesCpp</value>
     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName"></value>
-    <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.CustomExecutableRunConfiguration</value>
+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">Qt4ProjectManager.Qt4RunConfiguration:C:/DEVEL/QtCurvesCpp/QtCurvesCpp.pro</value>
+    <value type="bool" key="QmakeProjectManager.QmakeRunConfiguration.UseLibrarySearchPath">true</value>
+    <value type="QString" key="Qt4ProjectManager.Qt4RunConfiguration.CommandLineArguments"></value>
+    <value type="QString" key="Qt4ProjectManager.Qt4RunConfiguration.ProFile">QtCurvesCpp.pro</value>
+    <value type="bool" key="Qt4ProjectManager.Qt4RunConfiguration.UseDyldImageSuffix">false</value>
+    <value type="QString" key="Qt4ProjectManager.Qt4RunConfiguration.UserWorkingDirectory"></value>
+    <value type="QString" key="Qt4ProjectManager.Qt4RunConfiguration.UserWorkingDirectory.default">C:/DEVEL/build-QtCurvesCpp-Desktop_Qt_5_9_1_MinGW_32bit-Debug</value>
     <value type="uint" key="RunConfiguration.QmlDebugServerPort">3768</value>
     <value type="bool" key="RunConfiguration.UseCppDebugger">false</value>
     <value type="bool" key="RunConfiguration.UseCppDebuggerAuto">true</value>
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 1f838f1..dd517a0 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -49,3 +49,21 @@ void MainWindow::on_btnLine_clicked()
 	this->ui->renderArea->setShape(RenderArea::Line);
 	this->ui->renderArea->repaint();
 }
+
+void MainWindow::on_intervalInput_valueChanged(double arg1)
+{
+	this->ui->renderArea->setInternalLenght(arg1);
+	this->ui->renderArea->repaint();
+}
+
+void MainWindow::on_scaleInput_valueChanged(double arg1)
+{
+	this->ui->renderArea->setScale(arg1);
+	this->ui->renderArea->repaint();
+}
+
+void MainWindow::on_stepInput_valueChanged(double arg1)
+{
+	this->ui->renderArea->setStepCount(arg1);
+	this->ui->renderArea->repaint();
+}
diff --git a/mainwindow.h b/mainwindow.h
index f5b0d40..c245bb4 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -29,6 +29,12 @@ class MainWindow : public QMainWindow
 
 		void on_btnLine_clicked();
 
+		void on_intervalInput_valueChanged(double arg1);
+
+		void on_scaleInput_valueChanged(double arg1);
+
+		void on_stepInput_valueChanged(double arg1);
+
 	private:
 		constexpr static QWidget* root = 0;
 		Ui::MainWindow *ui;
diff --git a/mainwindow.ui b/mainwindow.ui
index 5f451d2..879f81d 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>690</width>
-    <height>602</height>
+    <width>670</width>
+    <height>612</height>
    </rect>
   </property>
   <property name="palette">
@@ -141,129 +141,286 @@
    <property name="styleSheet">
     <string notr="true">background-color: rgb(16, 15, 15);</string>
    </property>
-   <widget class="QWidget" name="">
+   <widget class="RenderArea" name="renderArea" native="true">
+    <property name="enabled">
+     <bool>true</bool>
+    </property>
+    <property name="geometry">
+     <rect>
+      <x>11</x>
+      <y>11</y>
+      <width>561</width>
+      <height>538</height>
+     </rect>
+    </property>
+    <zorder>splitter</zorder>
+   </widget>
+   <widget class="QPushButton" name="btnAstroid">
+    <property name="geometry">
+     <rect>
+      <x>580</x>
+      <y>12</y>
+      <width>80</width>
+      <height>21</height>
+     </rect>
+    </property>
+    <property name="sizePolicy">
+     <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+      <horstretch>0</horstretch>
+      <verstretch>0</verstretch>
+     </sizepolicy>
+    </property>
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);
+background-color: rgb(36, 35, 35);
+border-color: rgb(255, 255, 255);</string>
+    </property>
+    <property name="text">
+     <string>Astroid</string>
+    </property>
+    <property name="flat">
+     <bool>false</bool>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="btnCicloid">
+    <property name="geometry">
+     <rect>
+      <x>580</x>
+      <y>39</y>
+      <width>80</width>
+      <height>21</height>
+     </rect>
+    </property>
+    <property name="sizePolicy">
+     <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+      <horstretch>0</horstretch>
+      <verstretch>0</verstretch>
+     </sizepolicy>
+    </property>
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);
+background-color: rgb(36, 35, 35);
+border-color: rgb(255, 255, 255);</string>
+    </property>
+    <property name="text">
+     <string>Cicloid</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="btnHuygens">
+    <property name="geometry">
+     <rect>
+      <x>580</x>
+      <y>66</y>
+      <width>80</width>
+      <height>21</height>
+     </rect>
+    </property>
+    <property name="sizePolicy">
+     <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+      <horstretch>0</horstretch>
+      <verstretch>0</verstretch>
+     </sizepolicy>
+    </property>
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);
+background-color: rgb(36, 35, 35);
+border-color: rgb(255, 255, 255);</string>
+    </property>
+    <property name="text">
+     <string>Huygens</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="btnHypo">
+    <property name="geometry">
+     <rect>
+      <x>580</x>
+      <y>93</y>
+      <width>80</width>
+      <height>21</height>
+     </rect>
+    </property>
+    <property name="sizePolicy">
+     <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+      <horstretch>0</horstretch>
+      <verstretch>0</verstretch>
+     </sizepolicy>
+    </property>
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);
+background-color: rgb(36, 35, 35);
+border-color: rgb(255, 255, 255);</string>
+    </property>
+    <property name="text">
+     <string>Hypo Cycloid</string>
+    </property>
+   </widget>
+   <widget class="QDoubleSpinBox" name="scaleInput">
+    <property name="geometry">
+     <rect>
+      <x>580</x>
+      <y>170</y>
+      <width>81</width>
+      <height>22</height>
+     </rect>
+    </property>
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);</string>
+    </property>
+   </widget>
+   <widget class="QDoubleSpinBox" name="intervalInput">
+    <property name="geometry">
+     <rect>
+      <x>580</x>
+      <y>220</y>
+      <width>81</width>
+      <height>22</height>
+     </rect>
+    </property>
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);</string>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label">
+    <property name="geometry">
+     <rect>
+      <x>580</x>
+      <y>150</y>
+      <width>81</width>
+      <height>16</height>
+     </rect>
+    </property>
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);</string>
+    </property>
+    <property name="text">
+     <string>Scale</string>
+    </property>
+    <property name="textFormat">
+     <enum>Qt::PlainText</enum>
+    </property>
+    <property name="scaledContents">
+     <bool>false</bool>
+    </property>
+    <property name="alignment">
+     <set>Qt::AlignCenter</set>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label_2">
+    <property name="geometry">
+     <rect>
+      <x>580</x>
+      <y>200</y>
+      <width>81</width>
+      <height>16</height>
+     </rect>
+    </property>
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);</string>
+    </property>
+    <property name="text">
+     <string>Interval lenght</string>
+    </property>
+    <property name="textFormat">
+     <enum>Qt::PlainText</enum>
+    </property>
+    <property name="scaledContents">
+     <bool>false</bool>
+    </property>
+    <property name="alignment">
+     <set>Qt::AlignCenter</set>
+    </property>
+   </widget>
+   <widget class="QLabel" name="label_3">
+    <property name="geometry">
+     <rect>
+      <x>580</x>
+      <y>240</y>
+      <width>81</width>
+      <height>16</height>
+     </rect>
+    </property>
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);</string>
+    </property>
+    <property name="text">
+     <string>Step count</string>
+    </property>
+    <property name="textFormat">
+     <enum>Qt::PlainText</enum>
+    </property>
+    <property name="scaledContents">
+     <bool>false</bool>
+    </property>
+    <property name="alignment">
+     <set>Qt::AlignCenter</set>
+    </property>
+   </widget>
+   <widget class="QDoubleSpinBox" name="stepInput">
+    <property name="geometry">
+     <rect>
+      <x>580</x>
+      <y>260</y>
+      <width>81</width>
+      <height>22</height>
+     </rect>
+    </property>
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="btnLine_2">
     <property name="geometry">
      <rect>
       <x>10</x>
-      <y>10</y>
-      <width>671</width>
-      <height>540</height>
+      <y>560</y>
+      <width>101</width>
+      <height>21</height>
      </rect>
     </property>
-    <layout class="QHBoxLayout" name="horizontalLayout">
-     <item>
-      <widget class="RenderArea" name="renderArea" native="true">
-       <property name="enabled">
-        <bool>true</bool>
-       </property>
-       <zorder>splitter</zorder>
-      </widget>
-     </item>
-     <item>
-      <layout class="QVBoxLayout" name="verticalLayout">
-       <item>
-        <widget class="QPushButton" name="btnAstroid">
-         <property name="sizePolicy">
-          <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
-           <horstretch>0</horstretch>
-           <verstretch>0</verstretch>
-          </sizepolicy>
-         </property>
-         <property name="styleSheet">
-          <string notr="true">color: rgb(255, 255, 255);
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);
 background-color: rgb(36, 35, 35);
 border-color: rgb(255, 255, 255);</string>
-         </property>
-         <property name="text">
-          <string>Astroid</string>
-         </property>
-         <property name="flat">
-          <bool>false</bool>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QPushButton" name="btnCicloid">
-         <property name="sizePolicy">
-          <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
-           <horstretch>0</horstretch>
-           <verstretch>0</verstretch>
-          </sizepolicy>
-         </property>
-         <property name="styleSheet">
-          <string notr="true">color: rgb(255, 255, 255);
+    </property>
+    <property name="text">
+     <string>Background colour</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="btnLine_3">
+    <property name="geometry">
+     <rect>
+      <x>120</x>
+      <y>560</y>
+      <width>61</width>
+      <height>21</height>
+     </rect>
+    </property>
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);
 background-color: rgb(36, 35, 35);
 border-color: rgb(255, 255, 255);</string>
-         </property>
-         <property name="text">
-          <string>Cicloid</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QPushButton" name="btnHuygens">
-         <property name="sizePolicy">
-          <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
-           <horstretch>0</horstretch>
-           <verstretch>0</verstretch>
-          </sizepolicy>
-         </property>
-         <property name="styleSheet">
-          <string notr="true">color: rgb(255, 255, 255);
+    </property>
+    <property name="text">
+     <string> Line colour</string>
+    </property>
+   </widget>
+   <widget class="QPushButton" name="btnLine">
+    <property name="geometry">
+     <rect>
+      <x>580</x>
+      <y>120</y>
+      <width>80</width>
+      <height>21</height>
+     </rect>
+    </property>
+    <property name="styleSheet">
+     <string notr="true">color: rgb(255, 255, 255);
 background-color: rgb(36, 35, 35);
 border-color: rgb(255, 255, 255);</string>
-         </property>
-         <property name="text">
-          <string>Huygens</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QPushButton" name="btnHypo">
-         <property name="sizePolicy">
-          <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
-           <horstretch>0</horstretch>
-           <verstretch>0</verstretch>
-          </sizepolicy>
-         </property>
-         <property name="styleSheet">
-          <string notr="true">color: rgb(255, 255, 255);
-background-color: rgb(36, 35, 35);
-border-color: rgb(255, 255, 255);</string>
-         </property>
-         <property name="text">
-          <string>Hypo Cycloid</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QPushButton" name="btnLine">
-         <property name="styleSheet">
-          <string notr="true">color: rgb(255, 255, 255);
-background-color: rgb(36, 35, 35);
-border-color: rgb(255, 255, 255);</string>
-         </property>
-         <property name="text">
-          <string>Line</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <spacer name="verticalSpacer">
-         <property name="orientation">
-          <enum>Qt::Vertical</enum>
-         </property>
-         <property name="sizeHint" stdset="0">
-          <size>
-           <width>77</width>
-           <height>428</height>
-          </size>
-         </property>
-        </spacer>
-       </item>
-      </layout>
-     </item>
-    </layout>
+    </property>
+    <property name="text">
+     <string>Line</string>
+    </property>
    </widget>
   </widget>
   <widget class="QStatusBar" name="statusBar"/>
diff --git a/renderarea.cpp b/renderarea.cpp
index 6627121..37c7db9 100644
--- a/renderarea.cpp
+++ b/renderarea.cpp
@@ -56,6 +56,21 @@ QSize RenderArea::sizeHint() const
 	return QSize(400,200);
 }
 
+void RenderArea::setInternalLenght(double l)
+{
+	mIntervalLenght = l;
+}
+
+void RenderArea::setScale(double s)
+{
+	mScale = s;
+}
+
+void RenderArea::setStepCount(double s)
+{
+	mStepCount = s;
+}
+
 void RenderArea::paintEvent(QPaintEvent* event)
 {
 	QPainter painter{this};
diff --git a/renderarea.h b/renderarea.h
index 5663fea..6718a2d 100644
--- a/renderarea.h
+++ b/renderarea.h
@@ -24,6 +24,9 @@ class RenderArea : public QWidget
 		QColor backgroundColor() const { return mBackgroundColour; }
 		void setShape(ShapesType shape) { mShape = shape; OnShapeChanged(); }
 		ShapesType shape() const { return mShape; }
+		void setInternalLenght(double l);
+		void setScale(double s);
+		void setStepCount(double s);
 
 
 	signals: