let trianglePosY = 200;

​

function setup() {

  createCanvas(600, 400);

}

​

function draw() {

  background(120);

​

  noStroke();

  fill(0, 255, 0);

  rect(200, 200, 150, 150);

  stroke(255, 120, 0);

  fill(255, 120, 0, 200);

  ellipse(width / 2, height / 2, width / 4, height / 4);

  fill(255, 0, 0, 100);

  circle(width / 2, height / 2, height / 2);

​

  stroke(255, 120, 0);

  line(0, height / 2, width, height / 2);

​

  noStroke();

  fill(255);

  trianglePosX = mouseX;

  trianglePosY = mouseY;

​

  triangle(

    trianglePosX,

    trianglePosY,

    trianglePosX,

    trianglePosY + 100,

    trianglePosX + 100,

    trianglePosY + 100

  );

}

​

//ctrl shift f to organize all the lines of the code

// ctrl // to comment several lines at the same time

​