Using arrays to create a node and edge connector

[johnsmith17]

ok so i think im done but one last thing is that is there a way to connect each ball to its nearest neighbour like

int length = 101;
PVector[] position = new PVector[length];
int BallNum;

void setup() {
  size(600, 600);
  background(255);
}

void draw() {
  fill(255);
  layout();
  fill(0);
}

void mousePressed()
{
  BallNum++;
  position[BallNum]= new PVector(mouseX, mouseY);
  circle(position[BallNum].x, position[BallNum].y, 20);
 if (BallNum > 1) {
    line(position[BallNum].x,position[BallNum].y,position[BallNum-1].x,position[BallNum-1].y);
    line(position[1].x,position[1].y,position[BallNum].x,position[BallNum].y);
  }
  }


void layout() {
  for (int yLine=0; yLine<=width; yLine+=width/10) {
    for (int xLine=0; xLine<=height; xLine+=height/10) {  
      line(yLine, 0, yLine, height);
      line(0, xLine, width, xLine);
    }
  }
}