History, why Processing, comparison to other programs,

• cartesian coordinates vs screen coordinates.
• english language vs code language
• simple shapes (point, line, rectangle, ellipse)
• colors (grayscale, RGB, alpha, others)
• fill(), stroke(), smooth()

• syntax
• comment (single line, multilines)
• default structures/functions: setup() and draw()

• Getting Started
• Processing language reference
• Flight 404 very nice visuals made Processing