SOURCE

let a = 0.0;
let x=0;
let y=0;
let r=100;
function setup() {
createCanvas(500, 500);
background(100);
}
function draw() {
    //background(200,20);
    a+=2;
    fill(random(255),120,120);
    r=random(50,200);
y=r*sin(radians(a))+250;
x=r*cos(radians(a))+250;
triangle(x,y,300,240,340,180);
}

<script src='https://cdn.jsdelivr.net/npm/p5@1.1.9/lib/p5.min.js'></script>