update simple example and usage example in readme, additional line after imports for pep 8

Author: jtrip

README.rst

@@ -36,11 +36,13 @@ For a board with a built-in display.
     import terminalio
     from adafruit_display_text import label
 
+
     text = "Hello world"
     text_area = label.Label(terminalio.FONT, text=text)
     text_area.x = 10
     text_area.y = 10
-    board.DISPLAY.show(text_area)
+    while True:
+        board.DISPLAY.show(text_area)
 
 
 Contributing

examples/display_text_simpletest.py

@@ -0,0 +1,11 @@
+import board
+import terminalio
+from adafruit_display_text import label
+
+
+text = "Hello world"
+text_area = label.Label(terminalio.FONT, text=text)
+text_area.x = 10
+text_area.y = 10
+while True:
+    board.DISPLAY.show(text_area)