let x=40;
let y=40;
let d=40;
let speed1 = 13;
let speed2 = 62;
function setup(){
createCanvas(500,300);
colorMode(HSB,360,100,100,1);
noStroke();
}
function draw(){
//background(150,30);
fill(random(260),160,160);
y+=speed2;
if((y>height-d/2)||(y<d/2)){
speed2=-speed2;
}
x+=speed1;
if((x>width-d/2)||(x<d/2)){
speed1=-speed1;
}
ellipse(x,y,d,d);
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.1.9/p5.min.js"></script>