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<canvas id="paint" width="500" height="500"></canvas> <div> <p>Change some Settings:</p> <form id="options"> <label>Iteration:</label><input id="iteration" type="range" min="0" max="20" value="10"> <label>Size:</label><input id="size" type="range" min="10" max="80" value="50"> <label>Random:</label><input id="random" type="checkbox" checked=""> </form> </div>