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function setup() {
createCanvas(windowWidth, windowHeight);
}
function draw() {
//Vertical Lines
line(20, 0, 20, height);
line(40, 0, 40, height);
line(60, 0, 60, height);
//Horizontal Lines
line(0, 20, width, 20);
line(0, 40, width, 40);
line(0, 60, width, 60);
}