beginShape() and endShape() test

size(300, 100, P3D);
background(0);
strokeWeight(7);

noFill();
beginShape();
stroke(255,0,0);vertex(30, 20);
stroke(128,0,128);vertex(85, 20);
stroke(128,128,0);vertex(85, 75);
stroke(0,0,128);vertex(30, 75);
endShape(CLOSE);

beginShape();
stroke(0,0,128);vertex(130, 20);
stroke(128,0,128);vertex(185, 20);
stroke(128,128,0);vertex(185, 75);
endShape(CLOSE);

beginShape();
stroke(128,128,0);vertex(230, 20);
stroke(0,128,128);vertex(285, 20);
endShape(CLOSE);

beginShape();
stroke(128,128,128);vertex(330, 20);
endShape(CLOSE);