OPC opc; PImage dot; void setup() { size(800, 200); // Load a sample image dot = loadImage("color-dot.png"); // Connect to the local instance of fcserver opc = new OPC(this, "127.0.0.1", 7890); // Map one 64-LED strip to the center of the window opc.ledStrip(0, 64, width/2, height/2, width / 70.0, 0, false); } void draw() { background(0); // Draw the image, centered at the mouse location float dotSize = width * 0.2; image(dot, mouseX - dotSize/2, mouseY - dotSize/2, dotSize, dotSize); }