diff --git a/SketchWidget.py b/SketchWidget.py
index a189cb5..3ecdbb3 100644
--- a/SketchWidget.py
+++ b/SketchWidget.py
@@ -76,9 +76,9 @@ class SketchWidget:
 
         for shape in self.sketch:
             if isinstance(shape, Line):
-                self.drawLine(shape)
+                self.drawLine(shape, 0.03)
             elif isinstance(shape, Circle):
-                self.drawCircle(shape)
+                self.drawCircle(shape, 0.03)
 
         if gldrawable.is_double_buffered():
             gldrawable.swap_buffers()
@@ -89,18 +89,20 @@ class SketchWidget:
 
         return True
 
-    def drawLine(self, shape):
+    def drawLine(self, shape, size):
         self.drawFilledLine(shape.vars[0], shape.vars[1],
-                shape.vars[2], shape.vars[3], 0.03)
+                shape.vars[2], shape.vars[3], size)
 
-    def drawCircle(self, shape):
-        glBegin(GL_LINE_LOOP)
-        for i in range(24):
-            glVertex(shape.vars[0] +
-                    shape.vars[2] * math.sin(i * 2 * math.pi / 24.0),
-                    shape.vars[1] +
-                    shape.vars[2] * math.cos(i * 2 * math.pi / 24.0))
-        glEnd()
+    def drawCircle(self, shape, size):
+        steps = 24
+        for i in range(steps + 1):
+            angle = i * 2 * math.pi / steps
+            next_angle = (i + 1) * 2 * math.pi / steps
+            self.drawFilledLine(shape.vars[0] + shape.vars[2] * math.cos(angle),
+                    shape.vars[1] + shape.vars[2] * math.sin(angle),
+                    shape.vars[0] + shape.vars[2] * math.cos(next_angle),
+                    shape.vars[1] + shape.vars[2] * math.sin(next_angle),
+                    size)
 
     def drawFilledLine(self, x0, y0, x1, y1, size):
         glBegin(GL_QUADS)