let d1 = c2_x - c1_x;

  let d2 = c2_y - c1_y;

  let r = c1_r + c2_r;

  if (((d1*d1) + (d2*d2)) <= (r*r))

    return true;

  return false;

}

​

function obstacle(y,radius,col,amplitude,theta) {

    this.x = width + random(50,1500);

    this.y = y;

    this.color = col;

    this.radius = radius;

    this.amplitude = amplitude;

    this.theta = theta;

    this.update = function() {

      this.theta += 0.02;

      this.y = height/2 + sin(this.theta) * this.amplitude;

      this.x--;

      if ((this.x + this.radius) <= 0)

        this.x = width+random(50,1500);

    };

    this.draw = function() {

    fill(this.color);

    noStroke();

    ellipse(this.x, this.y, this.radius*2, this.radius*2);

  };

  this.collide = function(p) {

    if (c2c(this.x,this.y,this.radius,p.x,p.y,p.radius))

      return true;

    return false;

  };

​

};

​

function Player(x, y, col) {

    this.x = x;

    this.y = y;

    this.color = col;

    this.radius = 25;

  this.update = function(y) {

    //this.y = 0;

  };

  this.draw = function() {

    fill(this.color);

    ellipse(this.x,this.y,this.radius*2,this.radius*2);

  };

};

​

let max_radius;

let circles;

let player;

let state;

​

function setup() {

  createCanvas(800, 400);

  max_radius = 50;

  circles = [];

  state = true;

  for (let i = 0; i < 10; i++) {

    let o = new obstacle(height, random(5,max_radius), color(255), random(1,100), 0.0);

    circles.push(o)

  }

  player = new Player(150,height/2,color(0,255,0,190));

}

​

​

function draw() {

  background(0);

  if (state) {

    for (let c = 0; c < circles.length; c++) {

      //if (circles[c].collide(player))

      if (c2c(circles[c].x,circles[c].y,circles[c].radius,player.x,player.y,player.radius))

        state = false;

      circles[c].update();

      circles[c].draw();

    }

    if (keyIsDown(UP_ARROW)) {

      player.y-=5;

      player.y = max(player.radius,player.y);

    }

    if (keyIsDown(DOWN_ARROW)) {

      player.y+=5;

      player.y = min(height-player.radius,player.y);

    }

    player.draw();

  } else {

    textSize(48);

    textAlign(CENTER,CENTER);

    text("GAME OVER",0,0,width,height);

  }

}