Fixed documentation error

Signed-off-by: Joshua Fife <jpfife17@gmail.com>

xc7/pulse_width_led/README.rst

@@ -0,0 +1,36 @@
+Pulse Width
+~~~~~~~~~~~~
+
+
+This example is built specificity for the arty_35T. It demonstrates a greater variety of I/O and 
+a PWM that drives the RGB leds on the board. To build this example run the following
+commands:
+
+.. code-block:: bash
+   :name: example-pulse-arty-35t
+
+   make -C pulse_width_led
+
+
+At completion, the bitstreams are located in the build directory:
+
+.. code-block:: bash
+
+   cd pulse_width_led/build/arty_35
+
+Now, you can upload the design with:
+
+.. code-block:: bash
+
+   openocd -f ${INSTALL_DIR}/${FPGA_FAM}/conda/envs/${FPGA_FAM}/share/openocd/scripts/board/digilent_arty.cfg -c "init; pld load 0 top.bit; exit"
+
+After downloading the bitstream, you can experiment with and mix different amounts of red, green, and 
+blue on RGB led 0 by toggling different switches and buttons on and off. From left to right: 
+switches 3, 2, 1 control the intensity of blue, switch 0 and buttons 3 and 2 control the intensity of 
+red, and buttons 1 and 0 control the intensity of green. The following provides an example:
+
+.. image:: ../../docs/images/pwm.gif
+   :align: center
+   :width: 50%
+
+