createCanvas(800, 800);

  background(0);

  stroke(255);

  noFill();

}

​

function draw() {

  drawCircle();

  drawSquare();

  drawTriangle();

  drawRectangle();

  drawTrapezoid();

  drawParallelogram();

  noLoop();

}

​

function drawCircle() {

  ellipse(400, 400, 200, 200);

}

​

function drawSquare() {

  rectMode(CENTER);

  rect(400, 400, 200, 200);

}

​

function drawTriangle() {

  triangle(400, 300, 500, 500, 300, 500);

}

​

function drawRectangle() {

  rectMode(CENTER);

  rect(400, 400, 300, 150);

}

​

function drawTrapezoid() {

  beginShape();

  vertex(350, 300);

  vertex(450, 300);

  vertex(500, 500);

  vertex(300, 500);

  endShape(CLOSE);

}

​

function drawParallelogram() {

  beginShape();

  vertex(300, 350);

  vertex(500, 350);

  vertex(550, 450);

  vertex(350, 450);

  endShape(CLOSE);

}

​