Alfred

The MAD computer program, in turtle!
meatfighter.com/mad/

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Canvas.setpenopacity(1);

const turtle = new Turtle();
turtle.penup();
turtle.goto(-50,-20);
turtle.pendown();

const lines = [
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function walk(i) {
    const yo = 9;
    const line = lines[i];
    turtle.penup();
    turtle.goto(line[0], yo - line[1]);
    turtle.pendown();
    turtle.goto(line[2], yo - line[3])
    return i < lines.length-1;
}