Exercises

• Additional Exercises

• Even More Additional Exercises

Common problems

• (rotate-45 img) does not work. You want (rotate 45 img). Notice the space before the 45.
• How do you find out the RGB numbers for a color? The book has one method but I like (colorize "turquoise").
• (star 30 40 "blue") produces a faint blue star, but I wanted regular blue. The 40 means fade away 40% of the color. You should put "solid" instead.