let a = 0.0;
let x=0;
let y=0;
let r=200;
function setup() {
createCanvas(500, 500);
}
function draw() {
fill(random(350),120,)
r=random(255)
a++;
y=r*sin(radians(a))+250;
x=r*cos(radians(a))+250;
triangle(x,y,150,100,200,180);
}
<script src='https://cdn.jsdelivr.net/npm/p5@1.1.9/lib/p5.min.js'></script>