Redraw
The redraw() function makes draw() execute once. In this example, draw() is executed once every time the mouse is clicked.
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let y;
// The statements in the setup() function
// execute once when the program begins
function setup() {
createCanvas(720, 400);
stroke(255);
noLoop();
y = height * 0.5;
}
// The statements in draw() are executed until the
// program is stopped. Each statement is executed in
// sequence and after the last line is read, the first
// line is executed again.
function draw() {
background(0);
y = y - 4;
if (y < 0) {
y = height;
}
line(0, y, width, y);
}
function mousePressed() {
redraw();
}
