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.

Double Random by Ira Greenberg.

Using two random() calls and the point() function to create an irregular sawtooth line.


int totalPts = 300;
float steps = totalPts + 1;
  
void setup() {
  size(640, 360);
  stroke(255);
  frameRate(1);
} 

void draw() {
  background(0);
  float rand = 0;
  for  (int i = 1; i < steps; i++) {
    point( (width/steps) * i, (height/2) + random(-rand, rand) );
    rand += random(-5, 5);
  }
}