This example is for Processing 3+. If you have a previous version, use the examples included with your software. If you see any errors or have suggestions, please let us know.

Random.

Random numbers create the basis of this image. Each time the program is loaded the result is different.


void setup() {
  size(640, 360);
  background(0);
  strokeWeight(20);
  frameRate(2);
}

void draw() {
  for (int i = 0; i < width; i++) {
    float r = random(255);
    stroke(r);
    line(i, 0, i, height);
  }
}