diff --git a/CMakeLists.txt b/CMakeLists.txt
index a980a35..9cd2625 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ set(CMAKE_CXX_STANDARD 17)
 
 find_package(Eigen3 REQUIRED NO_MODULE)
 find_package(OpenMP)
-find_package(easy_profiler REQUIRED)
+find_package(easy_profiler)
 
 ## SET(CMAKE_CXX_FLAGS  "${CMAKE_CXX_FLAGS} -O2 -mfma")
 option(TUG_USE_OPENMP "Compile with OpenMP support" ON)
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 47042c2..b7c0d71 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -9,4 +9,4 @@ target_link_libraries(second_example tug)
 target_link_libraries(boundary_example1D tug)
 target_link_libraries(FTCS_2D_proto_example tug)
 target_link_libraries(FTCS_1D_proto_example tug)
-target_link_libraries(FTCS_2D_proto_example easy_profiler) 
\ No newline at end of file
+# target_link_libraries(FTCS_2D_proto_example easy_profiler) 
\ No newline at end of file
diff --git a/examples/FTCS_2D_proto_example.cpp b/examples/FTCS_2D_proto_example.cpp
index 17bfaf8..7171f62 100644
--- a/examples/FTCS_2D_proto_example.cpp
+++ b/examples/FTCS_2D_proto_example.cpp
@@ -7,17 +7,17 @@
  */
 
 #include <tug/Simulation.hpp>
-#include <easy/profiler.h>
-#define EASY_PROFILER_ENABLE ::profiler::setEnabled(true);
+// #include <easy/profiler.h>
+// #define EASY_PROFILER_ENABLE ::profiler::setEnabled(true);
 
 
 int main(int argc, char *argv[]) {
-    EASY_PROFILER_ENABLE;
-    profiler::startListen();  
+    // EASY_PROFILER_ENABLE;
+    // profiler::startListen();  
     // **************
     // **** GRID ****
     // **************
-    profiler::startListen();
+    // profiler::startListen();
     // create a grid with a 20 x 20 field
     int row = 20;
     int col = 20;
@@ -77,9 +77,9 @@ int main(int argc, char *argv[]) {
     
     // run the simulation
 
-    EASY_BLOCK("SIMULATION")
+    // EASY_BLOCK("SIMULATION")
     simulation.run();
-    EASY_END_BLOCK;
-    profiler::dumpBlocksToFile("test_profile.prof");
-    profiler::stopListen();
+    // EASY_END_BLOCK;
+    // profiler::dumpBlocksToFile("test_profile.prof");
+    // profiler::stopListen();
 }
\ No newline at end of file
diff --git a/src/FTCS.cpp b/src/FTCS.cpp
index 58812a9..bb91844 100644
--- a/src/FTCS.cpp
+++ b/src/FTCS.cpp
@@ -63,8 +63,13 @@ double calcHorizontalChangeLeftBoundaryConstant(Grid grid, Boundary bc, int row,
 }
 
 
-double calcHorizontalChangeLeftBoundaryClosed() {
-    return 0;
+double calcHorizontalChangeLeftBoundaryClosed(Grid grid, int row, int col) {
+    
+    double result = 
+        calcAlphaIntercell(grid.getAlphaX()(row, col+1), grid.getAlphaX()(row, col)) 
+            * (grid.getConcentrations()(row, col+1) - grid.getConcentrations()(row, col));
+    
+    return result;
 }
 
 
@@ -84,8 +89,13 @@ double calcHorizontalChangeRightBoundaryConstant(Grid grid, Boundary bc, int row
 }
 
 
-double calcHorizontalChangeRightBoundaryClosed() {
-    return 0;
+double calcHorizontalChangeRightBoundaryClosed(Grid grid, int row, int col) {
+    
+    double result = 
+        - (calcAlphaIntercell(grid.getAlphaX()(row, col-1), grid.getAlphaX()(row, col))
+         * (grid.getConcentrations()(row, col) - grid.getConcentrations()(row, col-1)));
+    
+    return result;
 }
 
 
@@ -105,8 +115,13 @@ double calcVerticalChangeTopBoundaryConstant(Grid grid, Boundary bc, int row, in
 }
 
 
-double calcVerticalChangeTopBoundaryClosed() {
-    return 0;
+double calcVerticalChangeTopBoundaryClosed(Grid grid, int row, int col) {
+    
+    double result = 
+        calcAlphaIntercell(grid.getAlphaY()(row+1, col), grid.getConcentrations()(row, col)) 
+            * (grid.getConcentrations()(row+1, col) - grid.getConcentrations()(row, col));
+
+    return result;
 }
 
 
@@ -126,8 +141,13 @@ double calcVerticalChangeBottomBoundaryConstant(Grid grid, Boundary bc, int row,
 }
 
 
-double calcVerticalChangeBottomBoundaryClosed() {
-    return 0;
+double calcVerticalChangeBottomBoundaryClosed(Grid grid, int row, int col) {
+
+    double result = 
+        - (calcAlphaIntercell(grid.getAlphaY()(row, col), grid.getAlphaY()(row-1, col))
+            * (grid.getConcentrations()(row, col) - grid.getConcentrations()(row-1, col)));
+
+    return result;
 }