AP CSP Unit 3 Space Theme

drawBackground();
drawStars();
drawSun();
drawEarth();
drawShip(25);
function drawEarth() {
  penUp();
  moveTo(randomNumber(0, 320), randomNumber(250, 260));
  penDown();
  function atmosphere() {
    dot(110);
    penRGB(255, 255, 255, 0.1);
    dot(120);
    penRGB(255, 255, 255, 0.3);
    dot(130);
    penRGB(255, 255, 255, 0.5);
    dot(140);
    penRGB(255, 255, 255, 0.7);
    dot(150);
    penRGB(255, 255, 255, 1);
  }
  function earth() {
    penRGB(randomNumber(92, 107), randomNumber(221, 236), randomNumber(240, 255), 1);
    dot(100);
    penWidth(randomNumber(20, 50));
    penRGB(randomNumber(10, 30), randomNumber(190, 210), 0, 1);
    for (var i = 0; i < randomNumber(2, 5); i++) {
      arcRight(90, 10);
      penWidth(randomNumber(20, 30));
      arcLeft(90, 10);
      turnRight(90);
      moveForward(25);
    }
  }
  atmosphere();
  earth();
  penUp();
}
function drawShip(distance) {
  moveTo(randomNumber(50, 300), randomNumber(50, 300));
  penWidth(randomNumber(10, 25));
  penRGB(randomNumber(0, 255), randomNumber(0, 255), randomNumber(0, 255), 1);
  penDown();
  turnRight(60);
  moveForward(distance);
  for (var i = 0; i < 2; i++) {
    turnRight(120);
    moveForward(distance);
  }
  //
  penRGB(randomNumber(0, 255), randomNumber(0, 255), randomNumber(0, 255), 1);
  turnLeft(90);
  moveForward(50);
  turnRight(90);
  moveForward(distance);
  turnRight(135);
  moveForward(35);
  turnRight(135);
  moveForward(distance);
  //
  turnLeft(90);
  moveForward(12.5);
  penColor("red");
  dot(10);
  moveForward(12.5);
  penRGB(randomNumber(0, 255), randomNumber(0, 255), randomNumber(0, 255), 1);
  turnLeft(90);
  moveForward(50);
  moveBackward(50);
  //
  turnRight(90);
  moveForward(distance);
  turnLeft(135);
  moveForward(35);
  penUp();
}
function drawSun() {
  penUp();
  moveTo(randomNumber(50, 300), randomNumber(50, 300));
  penDown();
  penColor("orange");
  dot(randomNumber(50, 100));
  penUp();
}
penUp();
function drawStars() {
  penUp();
  for (var i = 0; i < 4; i++) {
    moveTo(randomNumber(0, 316), randomNumber(0, 450));
    penColor("gold");
    dot(3);
  }
  penUp();
  for (var i = 0; i < 4; i++) {
    moveTo(randomNumber(0, 316), randomNumber(0, 450));
    penColor("gray");
    dot(3);
  }
  penUp();
  for (var i = 0; i < 4; i++) {
    moveTo(randomNumber(0, 315), randomNumber(0, 450));
    penColor("blue");
    dot(3);
  }
  penUp();
  for (var i = 0; i < 4; i++) {
    moveTo(randomNumber(0, 314), randomNumber(0, 449));
    dot(3);
    penColor("pink");
  }
  penUp();
  for (var i = 0; i < 4; i++) {
    moveTo(randomNumber(0, 313), randomNumber(0, 447));
    dot(4);
    penColor("white");
  }
  penUp();
  for (var i = 0; i < 4; i++) {
    moveTo(randomNumber(0, 310), randomNumber(0, 445));
    dot(2);
    penColor("gold");
  }
  penUp();
  for (var i = 0; i < 4; i++) {
    moveTo(randomNumber(0, 309), randomNumber(0, 442));
    dot(2);
    penColor("pink");
  }
  penUp();
  for (var i = 0; i < 4; i++) {
    moveTo(randomNumber(0, 308), randomNumber(0, 340));
    dot(2);
    penColor("blue");
  }
  penUp();
  for (var i = 0; i < 4; i++) {
    moveTo(randomNumber(0, 305), randomNumber(0, 335));
    dot(3);
    penColor("white");
  }
  penUp();
  for (var i = 0; i < 4; i++) {
    moveTo(randomNumber(0, 300), randomNumber(0, 330));
    dot(2);
    penColor("purple");
  }
}
function drawBackground(){
  penDown();
  penRGB(50, 0, 130, 1);
  dot(1000);
  penUp();
}