diff --git a/CST126SRS03/CST126SRS03.vcxproj b/CST126SRS03/CST126SRS03.vcxproj
index 55747d4..2fda73b 100644
--- a/CST126SRS03/CST126SRS03.vcxproj
+++ b/CST126SRS03/CST126SRS03.vcxproj
@@ -157,7 +157,7 @@
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="elephant.cpp" />
-    <ClCompile Include="elephant0.cpp" />
+    <ClCompile Include="loxodonta.cpp" />
     <ClCompile Include="gps.cpp" />
     <ClCompile Include="main.cpp" />
     <ClCompile Include="preserve.cpp" />
diff --git a/CST126SRS03/CST126SRS03.vcxproj.filters b/CST126SRS03/CST126SRS03.vcxproj.filters
index 6277a06..ed6dcd1 100644
--- a/CST126SRS03/CST126SRS03.vcxproj.filters
+++ b/CST126SRS03/CST126SRS03.vcxproj.filters
@@ -50,7 +50,7 @@
     <ClCompile Include="preserve.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
-    <ClCompile Include="elephant0.cpp">
+    <ClCompile Include="loxodonta.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
   </ItemGroup>
diff --git a/CST126SRS03/elephant.h b/CST126SRS03/elephant.h
index d5f73b3..cfd0e42 100644
--- a/CST126SRS03/elephant.h
+++ b/CST126SRS03/elephant.h
@@ -18,8 +18,8 @@ class Elephant
 	static constexpr unsigned kMaxWater{ 200 }; // liters/day
 	static constexpr unsigned kMaxFood{ 200 }; // kg/day
 
-	unsigned clock_{}; // TODO: Make the clock run. 
-	unsigned awake_{};
+	unsigned elapsedTime_{}; // minutes
+	unsigned awake_{}; // minutes
 	unsigned water_{}; // [0, kMaxWater)
 
 	unsigned weight_; // [minWeight_,maxWeight_)
@@ -34,9 +34,18 @@ class Elephant
 
 private:
 	static Preserve::Feature look(const Elephant& elephant);
+	void incrementTime(const unsigned minutes);
+	void decrementWater(const unsigned liters);
+	void decrementWeight(const unsigned kg);
+
+private:
+	bool isSleepy() const;
+	bool isThirsty() const;
+	bool isHungry() const;
 
 public:
 	GPS * getGps_() const;
+	unsigned getElapsedTime() const;
 
 private: // Available methods.
 	Direction getHeading(const Turn turn) const;
@@ -50,6 +59,6 @@ class Elephant
 	void move();
 
 public: // To be implemented methods. 
-	void tag(const GPS& gps);
+	void tag(GPS& gps);
 	void findHerd();
 };
diff --git a/CST126SRS03/elephant0.cpp b/CST126SRS03/loxodonta.cpp
similarity index 68%
rename from CST126SRS03/elephant0.cpp
rename to CST126SRS03/loxodonta.cpp
index 622ff04..685259a 100644
--- a/CST126SRS03/elephant0.cpp
+++ b/CST126SRS03/loxodonta.cpp
@@ -20,6 +20,75 @@ GPS* Elephant::getGps_() const
 	return gps_;
 }
 
+unsigned Elephant::getElapsedTime() const
+{
+	return elapsedTime_;
+}
+
+void Elephant::incrementTime(const unsigned minutes)
+{
+	auto min = minutes;
+
+	if (isSleepy())
+	{
+		min *= 2;
+	}
+
+	if (isThirsty())
+	{
+		min *= 2;
+	}
+
+	if (isHungry())
+	{
+		min *= 2;
+	}
+
+	elapsedTime_ += minutes;
+	awake_ += minutes;
+}
+
+void Elephant::decrementWater(const unsigned liters)
+{
+	int water = water_ - liters;
+	if (water < 0)
+	{
+		water = 0;
+	}
+	water_ -= water;
+}
+
+void Elephant::decrementWeight(const unsigned kg)
+{
+	if (weight_ >= minWeight_)
+	{
+		int weight = weight_ - kg;
+		if (weight < 0)
+		{
+			weight = 0;
+		}
+		weight_ = weight;
+	}
+}
+
+bool Elephant::isSleepy() const
+{
+	const auto result{ awake_ >= kMaxAwake };
+	return result;
+}
+
+bool Elephant::isThirsty() const
+{
+	const auto result{ water_ == 0 };
+	return result;
+}
+
+bool Elephant::isHungry() const
+{
+	const auto result{ weight_ < minWeight_ };
+	return result;
+}
+
 Preserve::Feature Elephant::look() const
 {
 	const auto result{ look(*this) };
@@ -103,6 +172,7 @@ int Elephant::listen() const
 
 void Elephant::sleep()
 {
+	incrementTime(120);
 	awake_ = 0;
 }
 
@@ -110,6 +180,7 @@ void Elephant::drink()
 {
 	const auto feature{ look() };
 
+	incrementTime(5);
 	if (feature == Preserve::Feature::kWater)
 	{
 		water_ = kMaxWater;
@@ -118,6 +189,7 @@ void Elephant::drink()
 
 void Elephant::eat()
 {
+	incrementTime(15);
 	if (gps_ != nullptr)
 	{
 		const auto feature{ look() };
@@ -138,18 +210,17 @@ void Elephant::eat()
 
 void  Elephant::turn(const Turn turn)
 {
+	incrementTime(1);
 	heading_ = getHeading(turn);
 }
 
 void  Elephant::move()
 {
+	incrementTime(60);
+	decrementWater(20);
+	decrementWeight(20);
 	if (gps_ != nullptr)
 	{
-		// TODO: Add awake time, lose water and weight. 
-		// TODO: If awake too long, slow down.
-		// TODO: If dehydrated, slow down.
-		// TODO: If below weight, slow down.
-		// TODO: Move to the next GPS.
 		gps_->move(heading_, 1);
 	}
 }
diff --git a/CST126SRS03/main.cpp b/CST126SRS03/main.cpp
index 0b329b6..0812edf 100644
Binary files a/CST126SRS03/main.cpp and b/CST126SRS03/main.cpp differ