var DELAY = 40;
var SPEED = 5;

var copter;
var dy = SPEED;

var OBSTACLE_WIDTH = 30;
var OBSTACLE_HEIGHT = 100;

var obstacle;


function start(){
    setup();
    setTimer(game, DELAY);
    mouseDownMethod(onMouseDown);
    mouseUpMethod(onMouseUp);
}

function setup(){
    setBackgroundColor(Color.black);
    copter = new Rectangle(30, 15);
    copter.setPosition(getWidth()/3, getHeight()/2);
    copter.setColor(Color.blue);
    add(copter);


    addObstacles();
}

function game()
{
    copter.move(0, dy);
    moveObstacles();
}

function onMouseDown(e)
{
    dy = -SPEED;
}

function onMouseUp(e) {
    dy = SPEED;
}

function addObstacles()
{
    obstacle = new Rectangle(OBSTACLE_WIDTH, OBSTACLE_HEIGHT);
    obstacle.setColor(Color.green);
    obstacle.setPosition(getWidth(), Randomizer.nextInt(0, getHeight() - OBSTACLE_HEIGHT));
    add(obstacle);
}

function moveObstacles()
{
    obstacle.move(-SPEED, 0);
    if(obstacle.getX() < 0) {
            obstacle.setPosition(getWidth(), Randomizer.nextInt(0, getHeight() - OBSTACLE_HEIGHT));
    }
}