diff --git a/README.md b/README.md
index 3076c3f..cc2cd72 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ t = displayio.TileGrid(ruler, pixel_shader=ruler.pixel_shader)
 g = displayio.Group()
 g.append(t)
 
-display.show(g)
+display.root_group = g
 
 display.refresh()
 
@@ -33,7 +33,7 @@ t = displayio.TileGrid(ruler, pixel_shader=ruler.pixel_shader)
 g = displayio.Group()
 g.append(t)
 
-display.show(g)
+display.root_group = g
 
 display.refresh()
 
@@ -57,10 +57,10 @@ t.y -= (ruler.height - display.height) // 2
 g = displayio.Group()
 g.append(t)
 
-display.show(g)
+display.root_group = g
 
 display.refresh()
 
 while True:
     pass
-```
\ No newline at end of file
+```
diff --git a/display-ruler-rgb-720p.bmp b/display-ruler-rgb-720p.bmp
new file mode 100644
index 0000000..80f4d65
Binary files /dev/null and b/display-ruler-rgb-720p.bmp differ
diff --git a/display-ruler-rgb.xcf b/display-ruler-rgb.xcf
new file mode 100644
index 0000000..1f1ebdc
Binary files /dev/null and b/display-ruler-rgb.xcf differ