// RADAR
let angle = 0;

function setup() {
  createCanvas(1024, 1024);
}

function draw() {
  // Background  
  fill(0)
  noStroke()
  circle(512, 512, 512)
  
  // Green sweep
  fill('green')
  arc(512, 512, 1024, 1024, radians(-90 + angle), radians(angle));
  
  // Sweeping Arm
  stroke(255)
  strokeWeight(8);
  
  let xArm = 512 * cos(radians(angle)) + 512;
  let yArm = 512 * sin(radians(angle)) + 512;
  
  
  line(xArm, yArm, 512, 512)
  
  angle += 1;
}