diff --git a/.idea/PixelEditor.iml b/.idea/PixelEditor.iml
index 9710855..686892a 100644
--- a/.idea/PixelEditor.iml
+++ b/.idea/PixelEditor.iml
@@ -2,7 +2,7 @@
 <module type="PYTHON_MODULE" version="4">
   <component name="NewModuleRootManager">
     <content url="file://$MODULE_DIR$" />
-    <orderEntry type="jdk" jdkName="Python 3.6" jdkType="Python SDK" />
+    <orderEntry type="jdk" jdkName="Python 3.6 (PixelEditor)" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
 </module>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 65531ca..110ffc2 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.6" project-jdk-type="Python SDK" />
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.6 (PixelEditor)" project-jdk-type="Python SDK" />
 </project>
\ No newline at end of file
diff --git a/src/Brush.py b/src/Brush.py
index 3721f65..2ceb72e 100644
--- a/src/Brush.py
+++ b/src/Brush.py
@@ -2,54 +2,80 @@
 from src.Layer import Layer
 
 
-class Brush:
-    _layer = None
-
-    def SetCurrentLayer(self, layer: Layer):
-        self._layer = layer
-
-
 class _Brush:
     currentColor = (0, 0, 0, 0)
 
-    _layer = None
-
-    def OnMouseDown(self, clickedPixel):
-        raise NotImplementedError
-
-    def OnDrag(self):
+    def OnMouseDown(self, clickedPixel, layer: Layer):
         pass
 
-    def OnMouseDrag(self, clickedPixel):
+    def OnMouseDrag(self, clickedPixel, layer: Layer):
         pass
 
-    def SetCurrentLayer(self, layer):
-        if isinstance(layer, Layer):
-            self._layer = layer
+    def OnMouseUp(self, clickedPixel, layer: Layer):
+        pass
 
     def SetCurrentColor(self, color):
         self.currentColor = color
 
 
-class PencilBrush(_Brush):
-    def OnMouseDown(self, clickedPixel):
-        self._layer.SetPixel(*clickedPixel, self.currentColor)
+class _PencilBrush(_Brush):
+    def OnMouseDown(self, clickedPixel, layer: Layer):
+        layer.SetPixel(*clickedPixel, self.currentColor)
 
-    def OnMouseDrag(self, clickedPixel):
-        self._layer.SetPixel(*clickedPixel, self.currentColor)
+    def OnMouseDrag(self, clickedPixel, layer: Layer):
+        layer.SetPixel(*clickedPixel, self.currentColor)
 
 
-class PickerBrush(_Brush):
-    def OnMouseDown(self, clickedPixel):
-        self.currentColor = self._layer.GetPixel(*clickedPixel)
+class _EraserBrush(_Brush):
+    def OnMouseDown(self, clickedPixel, layer: Layer):
+        layer.SetPixel(*clickedPixel, self.currentColor)
+
+    def OnMouseDrag(self, clickedPixel, layer: Layer):
+        layer.SetPixel(*clickedPixel, self.currentColor)
+
+
+class _FloodBrush(_Brush):
+    def OnMouseDown(self, clickedPixel, layer: Layer):
+        pass
+
+
+class _PickerBrush(_Brush):
+    def OnMouseDown(self, clickedPixel, layer: Layer):
+        self.currentColor = layer.GetPixel(*clickedPixel)
         return self.currentColor
 
 
-class FloodBrush(_Brush):
+class Brush:
+    _layer = None
+
+    pencil = _PencilBrush()
+    eraser = _EraserBrush()
+    flood = _FloodBrush()
+    picker = _PickerBrush()
+
+    _currentBrush: _Brush
+
     def OnMouseDown(self, clickedPixel):
-        pass
+        self._currentBrush.OnMouseDown(clickedPixel, self._layer)
+
+    def OnMouseDrag(self, clickedPixel):
+        self._currentBrush.OnMouseDrag(clickedPixel, self._layer)
+
+    def OnMouseUp(self, clickedPixel):
+        self._currentBrush.OnMouseUp(clickedPixel, self._layer)
+
+    def SetBrush(self, brush):
+        if brush == 'Pencil' or brush == 0:
+            self._currentBrush = self.pencil
+        elif brush == 'Eraser' or brush == 1:
+            self._currentBrush = self.eraser
+        elif brush == 'Flood' or brush == 2:
+            self._currentBrush = self.flood
+        elif brush == 'Picker' or brush == 3:
+            self._currentBrush = self.picker
+
+    def SetCurrentLayer(self, layer: Layer):
+        self._layer = layer
 
 
 Brush = Brush()
-PencilBrush = PencilBrush()
-FloodBrush = FloodBrush()
diff --git a/src/Section.py b/src/Section.py
index 84cdeda..e7c8f3b 100644
--- a/src/Section.py
+++ b/src/Section.py
@@ -1,6 +1,6 @@
 import pygame as pg
 from src.Sprite import Sprite
-from src.Brush import PencilBrush
+from src.Brush import Brush
 from math import ceil, floor
 
 
@@ -99,10 +99,12 @@ def Update(self):
         )
 
     def OnClicked(self, button, x, y):
+        print(x, y)
         if self.canvas.collidepoint(x, y):
-            _clickedPixelX = (x - self.canvas.x) // self.magnification
-            _clickedPixelY = (y - self.canvas.y) // self.magnification
-            PencilBrush.OnMouseDown((_clickedPixelX, _clickedPixelY))
+            _localX, _localY = self.LocalPosition((x, y))
+            _pixelX = _localX // self.magnification
+            _pixelY = _localY // self.magnification
+            Brush.OnMouseDown((_pixelX, _pixelY))
 
 
 class UISection(Section):
diff --git a/src/Window.py b/src/Window.py
index 3eaec38..9ff1703 100644
--- a/src/Window.py
+++ b/src/Window.py
@@ -1,6 +1,7 @@
 import pygame as pg
 from pygame.locals import *
 from src.Section import CanvasSection, UISection
+from src.Brush import Brush
 
 
 class MainWindow:
@@ -24,6 +25,11 @@ class MainWindow:
     mouseX, mouseY = 0, 0
     _mousePreviousX, _mousePreviousY = 0, 0
 
+    Brush.SetBrush('Pencil')
+    # ----- for test -----
+    Brush.pencil.SetCurrentColor((255, 255, 255, 255))
+
+
     def Run(self):
         pg.init()
         self.screen = pg.display.set_mode((self.w, self.h), SRCALPHA, 32)
@@ -61,6 +67,9 @@ def EventFeedback(self, event):
             if event.button == 1:
                 self.mouseButtonDown[0] = 1
 
+                # ----- for test -----
+                CanvasSection.OnClicked(1, self.mouseX, self.mouseY)
+
             elif event.button == 2:
                 self.mouseButtonDown[1] = 1
                 self._mousePreviousX, self._mousePreviousY = self.mouseX, self.mouseY