How to Design Programs, Second Ed exe6a

;Exercise 6: Use the picture primitives to create the image of a simple automobile.
;http://www.ccs.neu.edu/home/matthias/HtDP2e/part_one.html#%28part._sec~3aarith-num%29
;getting no where fast with this one...
;but this will make a convincing do not enter symbol
(overlay/align "middle" "middle"
                 (rectangle 150 60 "solid" "white")
                 (circle 100 "solid" "red"))