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+<?php
+
+# BASE CLASS ------------------
+class Board
+{
+  public static $brand;
+  public $modelName;
+  public $size;
+  public $width;
+  public $thickness;
+  public $volume;
+
+  # CONSTRUCTOR ------------
+
+  public function __construct(
+    string $brand,
+    string $modelName,
+    string $size,
+    string $width,
+    string $thickness,
+    string $volume
+
+  ) {
+    $this->brand = $brand;
+    $this->modelName = $modelName;
+    $this->size = $size;
+    $this->width = $width;
+    $this->thickness = $thickness;
+    $this->volume = $volume;
+  }
+
+  // FUNCTION TO GET BRAND NAME------------------
+  public function getBrand()
+  {
+    return $this->brand;
+  }
+
+  // FUNCTION TO GET VOLUME IN LITERS
+  public function getVolume()
+  {
+    return $this->volume;
+  }
+}
+
+
+
+class Surf extends Board
+{
+
+  const LOGO = "PYZEL Logo: <img src='https://www.pyzelsurfboards.com/images/logo.png'/>";
+  # PROPERTIES ------------------
+  public $tailType;
+  public $finsSystem;
+  public $finsNumber;
+
+  public static $leashHolder = "Standard";
+
+  # METHODS ----------
+  # CONSTRUCTOR ------------
+  public function __construct(
+    string $tailType,
+    string $finsSystem,
+    int $finsNumber
+  ) {
+    parent::__construct("Pyzel", "Ghost",  "5' 8''", "18 3/4", "2 5/16", "24,7 Litros");
+    $this->tailType = $tailType;
+    $this->finsSystem = $finsSystem;
+    $this->finsNumber = $finsNumber;
+  }
+
+
+  // FUNCTION TO REMOVE FINS (MIN 0)------------------
+
+  public function removeFins()
+  {
+    $minFins = "You have removed all your fins";
+
+    if ($this->finsNumber === "You have set all your fins") {
+      $this->finsNumber = 4;
+    }
+
+    if ($this->finsNumber === 0) {
+      $this->finsNumber = $minFins;
+    } else if ($this->finsNumber !== 0) {
+      $this->finsNumber--;
+    }
+
+    return $this->finsNumber;
+  }
+
+  // FUNCTION TO ADD MORE FINS (MAX 5)------------------
+  public function addFins()
+  {
+    if ($this->finsNumber === "You have removed all your fins") {
+      $this->finsNumber = 1;
+    }
+
+    $maxFins = "You have set all your fins";
+
+    if ($this->finsNumber === 5) {
+      $this->finsNumber = $maxFins;
+    } else if ($this->finsNumber <= 5) {
+
+      $this->finsNumber++;
+    }
+
+    return $this->finsNumber;
+  }
+}
+
+
+$newSurfboard = new Surf("Round Spin", "Futures", 3);
+
+echo "<pre>";
+echo "<img src='https://www.pyzelsurfboards.com/images/logo.png' width='200'";
+var_dump($newSurfboard) . "\n";
+echo "Leash Holder: " . Surf::$leashHolder;
+
+// echo "This is the volume" . "\n";
+
+// echo $newSurfboard->getVolume();
+
+// echo "<br>";
+// echo "<br>";
+
+// echo "Change your Fins!" . "\n";
+// echo "Removed 1 fin! Nº of Fins = " . $newSurfboard->removeFins() . "\n";
+// echo "<br>";
+// echo "Removed 1 fin! Nº of Fins = " . $newSurfboard->removeFins() . "\n";
+// echo "<br>";
+// echo "Removed 1 fin! Nº of Fins = " . $newSurfboard->removeFins() . "\n";
+// echo "<br>";
+
+// echo  $newSurfboard->removeFins() . "\n";
+
+// echo "<br>";
+
+// echo "Added 1 fin! Nº of Fins = " . $newSurfboard->addFins() . "\n";
+// echo "<br>";
+// echo "Added 1 fin! Nº of Fins = " . $newSurfboard->addFins() . "\n";
+// echo "<br>";
+// echo "Added 1 fin! Nº of Fins = " . $newSurfboard->addFins() . "\n";
+// echo "<br>";
+// echo "Added 1 fin! Nº of Fins = " . $newSurfboard->addFins() . "\n";
+// echo "<br>";
+// echo $newSurfboard->addFins();
\ No newline at end of file