Loop

/** * Loop. * * If noLoop() is run in setup(), the code in draw() * is only run once. In this example, click the mouse * to run the loop() function to cause the draw() the * run continuously. */ float y = 180; // The statements in the setup() function // run once when the program begins void setup() { size(640, 360); // Size should be the first statement stroke(255); // Set stroke color to white noLoop(); } void draw() { background(0); // Set the background to black line(0, y, width, y); y = y - 1; if (y < 0) { y = height; } } void mousePressed() { loop(); }