Fix #12

Correct the description of the UI and remove the shebang from the
joystick example.

docs/sense_emu_gui.rst

@@ -20,15 +20,15 @@ Usage
 .. image:: gui_overview.png
     :align: center
 
-The main window is divided into four parts. At the top left is a visual
+The main window is divided into four parts. At the left is a visual
 representation of the Sense HAT. Scripts using the emulator library
 (:mod:`sense_emu`) to set the HAT's LEDs will display the result here.
 Immediately below the LEDs are the rotation buttons which rotate the view of
 the HAT. These buttons also affect the action of the joystick buttons (covered
 below).
 
-At the top right, three sliders represent the temperature, pressure, and
-humidity of the emulated HAT's environment.
+To the right of the LEDs are three sliders representing the temperature,
+pressure, and humidity of the emulated HAT's environment.
 
 .. note::
 
@@ -38,22 +38,22 @@ humidity of the emulated HAT's environment.
     the sensor value will gradually drift towards the new setting at a similar
     rate to the sensors on the real HAT.
 
-At the bottom right of the window, a series of buttons are provided to emulate
-the joystick on the HAT. The buttons will simulate *press*, *release*, and
-*hold* events generated by the real joystick. When the view of the HAT is
+On the far right of the window, three sliders provide the orientation of the
+emulated HAT in terms of yaw (rotation around the vertical Z axis), pitch
+(rotation around the Y axis), and roll (rotation around the X axis). Adjusting
+these sliders affect the accelerometer, gyroscope, and magnetometer (compass)
+sensors on the emulated HAT. The emulated HAT assumes gravity runs vertically
+in the direction of the Z axis (as in the real HAT), and that North is in the
+direction of the X axis.
+
+Finally, at the bottom right of the window, a series of buttons are provided to
+emulate the joystick on the HAT. The buttons will simulate *press*, *release*,
+and *hold* events generated by the real joystick. When the view of the HAT is
 rotated, the joystick buttons will act in the new orientation of the HAT. For
 example, initially the "up" button will send "up" events. After the HAT is
 rotated 90° the "up" button will send "right" events. After another 90°
 rotation, the "up" button will send "down" events, and so on.
 
-Finally, at the bottom left of the window, three sliders provide the
-orientation of the emulated HAT in terms of yaw (rotation around the vertical Z
-axis), pitch (rotation around the Y axis), and roll (rotation around the X
-axis). Adjusting these sliders affect the accelerometer, gyroscope, and
-magnetometer (compass) sensors on the emulated HAT. The emulated HAT assumes
-gravity runs vertically in the direction of the Z axis (as in the real HAT),
-and that North is in the direction of the X axis.
-
 .. note::
 
     The emulator must be run prior to starting any scripts which expect to use
@@ -95,3 +95,4 @@ During playback, the sensor sliders will move according to the data in the
 recording but will be disabled (to prevent the user affecting the replay). At
 the end of the replay (or immediately after termination of playback), the
 sliders will be left at their present positions and re-enabled.
+

sense_emu/examples/intermediate/joystick_loop.py

@@ -1,4 +1,3 @@
-#!/usr/bin/python3
 from sense_emu import SenseHat
 
 x = y = 4