function setup(){
createCanvas(500,500);
background(200);
strokeWeight
}
function draw(){
beginShape();
vertex(250,10);
vertex(175,150);
vertex(50,150);
vertex(130,260);
vertex(100,400);
vertex(250,340);
vertex(400,400);
vertex(370,260);
vertex(450,150);
vertex(325,150);
endShape(CLOSE);
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.1.9/p5.min.js"></script>