SOURCE

let x=30;
let y=40;
let z=200;
let n=60;
function setup(){
    createCanvas(650,650);
    background(30,260,199,66);
}
function draw(){
    noStroke();
    rect(180,30,-150,50);
    rect(120,72,-99,370);
    rect(190,190,-140,120);
    rect(150,315,213,95);
    rect(330,61,-75,240);
    rect(290,190,190,75);

if(keyIsPressed){
        if(keyCode==30){
            x-=2;
        }
        else if(keyCode == 36){
            x+=2;
        }
        else if(keyCode ==32){
            y-=2;
        }
        else if(keyCode ==34){
            y+=2;
        }
}
        stroke(0);
    ellipse(x,y,40,40);
    }

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