docs/pyboard: Emphasize the instructions for making a USB mouse.
It wasn't clear why that element was `10` instead of `0`.  Also bumped the
`10` to `100` to make the mouse movement more obvious.
@@ -39,14 +39,15 @@ Sending mouse events by hand
To get the py-mouse to do anything we need to send mouse events to the PC.
We will first do this manually using the REPL prompt. Connect to your
-pyboard using your serial program and type the following::
+pyboard using your serial program and type the following (no need to type
+the ``#`` and text following it)::
>>> hid = pyb.USB_HID()
- >>> hid.send((0, 10, 0, 0))
+ >>> hid.send((0, 100, 0, 0)) # (button status, x-direction, y-direction, scroll)
-Your mouse should move 10 pixels to the right! In the command above you
-are sending 4 pieces of information: button status, x, y and scroll. The
-number 10 is telling the PC that the mouse moved 10 pixels in the x direction.
+Your mouse should move 100 pixels to the right! In the command above you
+are sending 4 pieces of information: **button status**, **x-direction**, **y-direction**, and **scroll**. The
+number 100 is telling the PC that the mouse moved 100 pixels in the x direction.
Let's make the mouse oscillate left and right::
