Redraw
/**
* Redraw.
*
* The redraw() function makes draw() execute once.
* In this example, draw() is executed once every time
* the mouse is clicked.
*/
float y;
// The statements in the setup() function
// execute once when the program begins
void setup() {
size(640, 360); // Size should be the first statement
stroke(255); // Set line drawing color to white
noLoop();
y = height * 0.5;
}
// The code in draw() is run until the program
// is stopped. Each statement is executed in
// sequence and after the last line is read,
// the first line is run again.
void draw() {
background(0); // Set the background to black
y = y - 4;
if (y < 0) { y = height; }
line(0, y, width, y);
}
void mousePressed() {
redraw();
}