var x=200;
var y=200;
var speed=2;
function setup() {
createCanvas(400, 400);
background(220);
}
function draw() {
fill(random(360),0,0);
ellipse(x,y,20,20);
if(keyIsPressed){
if(key=='a'){
x-=speed;
}
if(key=='d'){
x+=speed;
}
}
if(keyIsDown(87)){
y-=speed;
}
if(keyIsDown(83)){
y+=speed;
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.1.9/p5.min.js"></script>