Just a demo of a simple algorithm I came up with. for the AP exam Mode 1: value determines the direction of the line. Mode 2: value determines the size of the dot. Sadly scratches pen size really limits this project.
At the start 10 points are randomly paced on the screen and each given a random value. More points are then added, each point finds the closest point and it's value is the value of the closest point + a random value that scales with the distance to the closest point. Value = value of closest point + (dist/randomness * random (1 to 0.0001))