/*
 * An example of a CLOSED polygon.
 *
 * Note well that there are four vertices, and
 * that you should NOT repeat any of them. The
 * last one is automatically connected to the first
 * due to the use of endShape(CLOSE).
 *
 * Note that strokeCap is irrelevant once shape is closed.
 */
size(600,400);

noFill();
strokeWeight(30);


beginShape();
vertex(200,100);
vertex(250,200);
vertex(200,300);
vertex(500,200);
endShape(CLOSE);  // Note use of CLOSE parameter