createCanvas(400, 400);

  background(255);

  noStroke();

  fill(0);

  rect(100, 50, 200, 75); // upper rectangle

  rect(50, 125, 300, 50); // lower rectangle

  triangle(100, 50, 75, 125, 100, 125); //left triangle

  triangle(300, 50, 300, 125, 325, 125); //right triangle

  circle(100, 175, 50); //right wheel

  circle(300, 175, 50); //right wheel

}

​