Draw A Heart
Use Beziér curves
Make A Simple Robot
A basic, simple, robot. Then another version centered on 0,0 so you can use translate() more easily
Simplest Movement
The simplest possible way to move a robot
Wrap Around
Wrap an object around so it appear on the opposite side as soon as it goes off the edge
Buttons Anywhere
Buttons you can use anywhere to do anything
Simple Key Control
Use different keys on the keyboard to trigger different events
Multiple Key Control
Same as simple key control, but more functions
Timed Animations
Using a timer to trigger a recurring event, like an eye blink
Simultaneous Animations
Move the robot's arms with keys and also have it blink
Rotating Wheel
Rotate a wheel with spokes drawn with a for loop, then add some fancier motion when the robot is moving left or right
Dancing Arms
Complex nested matrices controlled with the mouse
Image Scroll
Move multiple images seamlessly and eternally to imply 3 dimensions
Googly Eyes
Eyes use trigonometry [atan2(a,b)] to follow the mouse, and a laser canon using the same technique
Triggered Sounds
Using Processing Sound library to create a laser beam blast triggered with the space bar
Looping Sounds
Using Processing Sound library to create a continuous looping sound effect when a robot moves
Multi Robots
Using Processing Sound library to create a continuous looping sound effect when a robot moves