SOURCE

var speed=25;
var d=70;
var x;
var y;
var c=1;
var h=3
function setup(){
  createCanvas(650,650);
  x=width/4;
  y=height/4;
  colorMode(HSB,30,270,90,0);
}
function draw(){
  c+=h;
  if(c>190||c<=0){
    h=-h;
  }
  noStroke();
  fill(c,30,290,90);
  x+=random(-speed,speed);
  y+=random(-speed,speed);
  x=constrain(x,0,width);
  y=constrain(y,0,height);
  triangle(x,y,x+40,y+30,x-40,y+30);

}

<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.1.9/p5.min.js"></script>