OPC opc;
PImage dot;

void setup()
{
  size(800, 400);

  dot = loadImage("dot.png");

  // Connect to the local instance of fcserver. You can change this line to connect to another computer's fcserver
  opc = new OPC(this, "127.0.0.1", 7890);

  opc.ledGrid8x8(0 * 64, width * 1/8, height * 1/4, height/16, 0, true);
  opc.ledGrid8x8(1 * 64, width * 3/8, height * 1/4, height/16, 0, true);
  opc.ledGrid8x8(2 * 64, width * 5/8, height * 1/4, height/16, 0, true);
  opc.ledGrid8x8(3 * 64, width * 7/8, height * 1/4, height/16, 0, true);
  opc.ledGrid8x8(4 * 64, width * 1/8, height * 3/4, height/16, 0, true);
  opc.ledGrid8x8(5 * 64, width * 3/8, height * 3/4, height/16, 0, true);
  opc.ledGrid8x8(6 * 64, width * 5/8, height * 3/4, height/16, 0, true);
  opc.ledGrid8x8(7 * 64, width * 7/8, height * 3/4, height/16, 0, true);
}

void draw()
{
  background(0);
  
  // Change the dot size as a function of time, to make it "throb"
  float dotSize = height * 0.6 * (1.0 + 0.2 * sin(millis() * 0.01));
  
  // Draw it centered at the mouse location
  image(dot, mouseX - dotSize/2, mouseY - dotSize/2, dotSize, dotSize);
}