var y = 200;

var raioP = 25;

var xo = 100; 

var yo = 120;

var raioO = 30; 

​

function setup() {

  createCanvas(300, 300);

}

​

function draw() {

  background(210);

  fill(255); 

  ellipse(x, y, 2*raioP, 2*raioP);

  if ( keyIsDown(DOWN_ARROW) ) {

    y = y + 5;

  }

  if ( keyIsDown(UP_ARROW) ) {

    y = y - 5;

  }

  if ( keyIsDown(RIGHT_ARROW) ) {

    x = x + 5;

  }

  if ( keyIsDown(LEFT_ARROW) ) {

    x = x - 5;

  }

  fill(70); 

  ellipse(xo, yo, 50, 50);

  if ( dist(x, y, xo, yo) < raioP + raioO ) {

    x = 250; 

    y = 300;

  }

}