// Prepare Turtle to Draw
hide();
penUp();

// First draw the background
drawBackground();

//Draw all the starfish
moveTo(150,400);
drawStarfish(100);
moveTo(300,200);
drawStarfish(200);

// Draw all the seagrass on bottom of screen
moveTo(50,450);
turnTo(0);
drawSeagrass(5);
moveTo(100,450);
turnTo(0);
drawSeagrass(10);

// Draw all the fish
moveTo(100,100);
drawFish();
moveTo(200,200);
drawFish();

// Make the background by drawing a large dot
function drawBackground(){
  penColor("DarkBlue");
  dot(1000);
}

// Draw a five pointed star with a wide pen.
function drawStarfish(size){
  // Setting up the pen
  penRGB(255,0,255);
  penWidth(20);
  penDown();

  turnTo(0);
  moveForward(size);
  turnRight(144);
  moveForward(size);
  turnRight(144);
  moveForward(size);
  turnRight(144);
  moveForward(size);
  turnRight(144);
  moveForward(size);
  turnRight(144);
  penUp();
}

// Switches between left and right arcs to make sea grass
function drawSeagrass(size){
  // Setting up the pen
  penRGB(0,255,0);
  penWidth(10);
  penDown();

  // Draw four arcs to make grass
  arcLeft(30,size);
  arcRight(60,size);
  arcLeft(60,size);
  arcRight(60,size);

  penUp();
}

// Draw a single fish at current turtle location
function drawFish(){
  // Setting up the pen
  penRGB(250,125,0);
  penWidth(30);
  penDown();

  // Fish body
  dot(30);
  turnTo(90);
  moveForward(30);

  // Fish tail
  turnLeft(30);
  moveForward(30);
  turnRight(120);
  moveForward(30);
  turnRight(120);
  moveForward(30);
  turnRight(120);

  penUp();
}