diff --git a/Tutorial:Screen,-colors-and-squares.md b/Tutorial:Screen,-colors-and-squares.md
index b081b12..0573f31 100644
--- a/Tutorial:Screen,-colors-and-squares.md
+++ b/Tutorial:Screen,-colors-and-squares.md
@@ -14,9 +14,7 @@ import (
 
 func update(screen *ebiten.Image) error {
     // Display the text though the debug function
-    if err := ebitenutil.DebugPrint(screen, "Our first game in Ebiten!"); err != nil {
-        return err
-    }
+    ebitenutil.DebugPrint(screen, "Our first game in Ebiten!")
     return nil
 }
 
@@ -67,14 +65,10 @@ Remember the `update()` function. The function which keeps being called by Ebite
 func update(screen *ebiten.Image) error {
     
     // Fill the screen with #FF0000 color
-    if err := screen.Fill(color.NRGBA{0xff, 0x00, 0x00, 0xff}); err != nil {
-        return err
-    }
+    screen.Fill(color.NRGBA{0xff, 0x00, 0x00, 0xff})
     
     // Display the text though the debug function
-    if err := ebitenutil.DebugPrint(screen, "Our first game in Ebiten!"); err != nil {
-        return err
-    }
+    ebitenutil.DebugPrint(screen, "Our first game in Ebiten!")
     
     return nil
 }
@@ -111,17 +105,11 @@ func update(screen *ebiten.Image) error {
     // ...
     if square == nil {
         // Create an 16x16 image
-        var err error
-        square, err = ebiten.NewImage(16, 16, ebiten.FilterNearest)
-        if err != nil {
-            return err
-        }
+        square, _ = ebiten.NewImage(16, 16, ebiten.FilterNearest)
     } 
 
     // Fill the square with the white color
-    if err := square.Fill(color.White); err != nil {
-        return err
-    }
+    square.Fill(color.White)
 
     // ...
 }
@@ -141,36 +129,24 @@ var square *ebiten.Image
 func update(screen *ebiten.Image) error {
     
     // Fill the screen with #FF0000 color
-    if err := screen.Fill(color.NRGBA{0xff, 0x00, 0x00, 0xff}); err != nil {
-        return err
-    }
+    screen.Fill(color.NRGBA{0xff, 0x00, 0x00, 0xff})
     
     // Display the text though the debug function
-    if err := ebitenutil.DebugPrint(screen, "Our first game in Ebiten!"); err != nil {
-        return err
-    }
+    ebitenutil.DebugPrint(screen, "Our first game in Ebiten!")
 
     if square == nil {
         // Create an 16x16 image
-        var err error
-        square, err = ebiten.NewImage(16, 16, ebiten.FilterNearest)
-        if err != nil {
-            return err
-        }
+        square, _ = ebiten.NewImage(16, 16, ebiten.FilterNearest)
     } 
 
     // Fill the square with the white color
-    if err := square.Fill(color.White); err != nil {
-        return err
-    }
+    square.Fill(color.White)
 
     // Create an empty option struct
     opts := &ebiten.DrawImageOptions{}
     
     // Draw the square image to the screen with an empty option
-    if err := screen.DrawImage(square, opts); err != nil {
-        return err
-    }
+    screen.DrawImage(square, opts)
     
     return nil
 }