Add some more images to the README.

README.md

@@ -4,6 +4,8 @@ Beautiful Micropython Graphics
 
 <img src="./pico-tempe.png" width="480" alt="A Raspberry Pi Pico with a data visualization on a screen" />
 
+<img src="./pico-tempe-shapes.png" width="480" alt="A Raspberry Pi Pico with a variety of shapes drawn on a screen" /> <img src=".//docs/source/user_guide/shapes.png" width="160" alt="A variety of shapes drawn in an image" />
+
 Tempe is a pure-Micropython graphics system designed to be make using the
 full capabilities of display devices more accessible, particularly on
 memory-constrained microcontrollers.  The aim is to allow data scientists,