to do

1. colors - color as int value and color() function usage, especially alpha channel which is crucial for smooth drawing
2. geometry - ellipse() and rect() functions as method for smooth and fast point draw, point() with stroke width less than 1
3. conditional, inline conditional '?:' operator (for example: val = random(1)<0.5:-1:1) 6.1="" trig="" -="" sin="" cos="" and="" atan2="" (to="" get="" angle="" between="" points)="" 6.2="" calculations="" lerp="" lerpcolor="" +="" round="" floor="" ceil="" int="" as="" float-="">int conversion
4. random - noise()!
5. arrays - ArrayList as dynamic array, for(int i : array) {} - fast array elements walker

What is missing:

• PImage + blending/filtering/cut&paste
• pixels[] operations
• PGraphics (advanced)
• setup(): smooth(), stroke()/noStroke(), fill()/noFill(), background(),
• draw() / events workflow
• screen size (width/height)
• noise() - smooth randomness
• PVector
• color channel accessors (red(),....)