Draw Orbit of Earth

// sketch.js

var xC;  // orbit center
var yC;

var rV = 120;  // orbit radius Venus
var rE = 180;  // orbit radius Earth

function setup() {
  var cnv = createCanvas(640, 400);
  cnv.position(24, 140);

  background(0, 0, 255);

  xC = width/2;
  yC = height/2;

  ellipseMode(RADIUS);
} //setup

function draw() {
  background(0, 0, 255);

  drawCentralPoint();
  drawOrbits();
} //draw

function drawCentralPoint() {
  strokeWeight(3);
  point(xC, yC);
} //drawCentralPoint

function drawOrbits() {
  strokeWeight(1);
  fill(0, 0, 255);
  ellipse(xC, yC, rV, rV);
  ellipse(xC, yC, rE, rE);
} //drawOrbits