void setup() {
  size(600, 600);
  background(255);
  stroke(0);
  strokeWeight(2);
  noFill();
  
  generateContinuousLine();
}

void draw() {
  // Static image - no need to update continuously
}

// Function to generate the continuous line that covers the canvas
void generateContinuousLine() {
  float x = 0;  
  float y = 0;
  float stepSize = 40;  // Step length for each move
  int cols = int(width / stepSize);  // Explicit cast to int
  int rows = int(height / stepSize); // Explicit cast to int
  
  beginShape();
  vertex(x, y);
  
  boolean directionRight = true;  // Controls zigzag movement

  for (int j = 0; j < rows; j++) {
    for (int i = 0; i < cols; i++) {
      if (directionRight) {
        x += stepSize;
      } else {
        x -= stepSize;
      }
      
      x = constrain(x, 0, width);  // Ensure the line stays within bounds
      
      // Occasionally make a triangular detour
      if (random(1) > 0.7) {
        float angle = random(-PI / 3, PI / 3);
        float detourX = x + cos(angle) * stepSize;
        float detourY = y + sin(angle) * stepSize;
        vertex(detourX, detourY);  // Extra point for triangle effect
      }
      
      vertex(x, y);
    }
    
    y += stepSize;  // Move down a row
    directionRight = !directionRight;  // Flip movement direction
  }
  
  endShape();
}