SOURCE

let x=25;
let y=25;
function setup() {
createCanvas(600, 600);
background(0);

    
}
function draw(){
     fill(random(350),100,120);
     if(keyIsPressed){
     if(keyCode==37){
     x-=5;
     }
  else if(keyCode==39){
   x+=5;
  }
  else if(keyCode==38){
   y-=5;
  }
  else if(keyCode==40){
   y+=5;
  }
 }
 ellipse(x,y,60,60);
}
     
  

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