import java.util.*;

int size = 250;
int weight = 20;
int cellSize = 20;
int gridSize = 5;
int repetitions = int(random(5));
int dir = int(random(0, 2));

void setup() {
  size(500, 500);
}

void draw() {
  background(255);
  stroke(0);
  fill(255);
  strokeWeight(weight);
  float centerW = (width/2)-(size/2);
  float centerH = (height/2)-(size/2);
  rect(centerW, centerH, size, size);
  strokeCap(SQUARE);
  stroke(0);
  strokeWeight(weight/2);
  //fill(255);
  //float startX = centerW + weight;
  //float startY = centerH + weight;
  //line(startX, startY, startX + (gridSize*repetitions*(1-dir)), startY + (gridSize*repetitions*dir));
}

class Grid {
  grid = int[gridSize][gridSize];

  void fillGrid() {
    // pick a random empty cell
    int X = int(random(0, gridSize));
    int Y = int(random(0, gridSize));
    //  pick a length for the line
    int len = int(random(0, 5));
    //  choose a direction to extend the 'head' of the line from
    int dir = int(random(0, 4));

    //  repeat until length of line is reached
    // repeat until grid is filled
  }
}

class Line {
  LinkedList line = new LinkedList();  

  void add(int point) {
    line.add(point);
  }

  void draw() {
    // for each point in the list
    // draw a line for each adjacent point
    // translate it to the screen position
  }
}