Pulsed walk with randomized turns.

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Canvas.setpenopacity(1); const turtle = new Turtle(); function walk(i) { turtle.forward((2+Math.sin(2+Math.sin(i)+i))*(1+Math.round(i/50000)/2)); if (Math.random() >= 0.5) { if (Math.sin(i*0.03) >= 0.5) { turtle.right(i%17 ? 45 : 90); } else { turtle.left(i%27 ? 135 : 180); } } return i < 100000; }