diff --git a/homework4/.gitignore b/homework4/.gitignore
index cf28b91..da825a4 100644
--- a/homework4/.gitignore
+++ b/homework4/.gitignore
@@ -1,8 +1,7 @@
 # Folder: #
 cmake-build-debug/
 googletest/
 html/
 
 # Files: #
-.idea/
-CMakeLists.txt
\ No newline at end of file
+.idea/
\ No newline at end of file
diff --git a/homework4/CMakeLists.txt b/homework4/CMakeLists.txt
new file mode 100644
index 0000000..197884a
--- /dev/null
+++ b/homework4/CMakeLists.txt
@@ -0,0 +1,109 @@
+cmake_minimum_required (VERSION 3.1)
+project (Particles)
+cmake_policy(VERSION 3.3)
+
+set(CMAKE_EXPORT_COMPILE_COMMANDS 1)
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")
+
+################################################################
+# libpart
+################################################################
+
+add_library(part SHARED
+  compute_boundary.cc
+  compute_verlet_integration.cc 
+  particle.cc 
+  planet.cc
+  compute_gravity.cc 
+  csv_reader.cc 
+  particles_factory_interface.cc 
+  planets_factory.cc 
+  compute_contact.cc 
+  compute_kinetic_energy.cc 
+  csv_writer.cc 
+  system.cc 
+  compute_energy.cc 
+  compute_potential_energy.cc 
+  ping_pong_ball.cc
+  material_point.cc 
+  system_evolution.cc 
+  ping_pong_balls_factory.cc 
+  compute_interaction.cc
+  compute_temperature.cc
+  material_points_factory.cc)
+
+################################################################
+# FFTW
+################################################################
+
+include_directories("/usr/local/Cellar/fftw/3.3.8_1/include")
+option(USE_FFTW "Use fftw library" ON)
+
+if(USE_FFTW)
+  add_definitions(-DUSE_FFTW)
+  find_package(FFTW)
+  target_link_libraries(part ${FFTW_LIBRARIES})
+endif(USE_FFTW)
+
+################################################################
+# Particles executable
+################################################################
+
+add_executable(particles main.cc)
+target_link_libraries(particles part)
+
+################################################################
+# Google test
+################################################################
+
+add_subdirectory(googletest)
+
+add_executable(test_kepler test_kepler.cc)
+target_link_libraries(test_kepler part gtest_main gtest pthread)
+
+if(USE_FFTW)
+add_executable(test_fft test_fft.cc)
+target_link_libraries(test_fft part gtest_main gtest ${FFTW_LIBRARIES} pthread)
+endif(USE_FFTW)
+
+################################################################
+# Doxygen
+################################################################
+
+#find_package(Doxygen)
+#if (DOXYGEN_FOUND)
+#
+## to set other options, read: https://cmake.org/cmake/help/v3.9/module/FindDoxygen.html
+#doxygen_add_docs(
+#    doxygen
+#    ${PROJECT_SOURCE_DIR}
+#    COMMENT "Generate html pages"
+#)
+#add_custom_target(doc DEPENDS doxygen)
+#endif(DOXYGEN_FOUND)
+
+################################################################
+# Pybind
+################################################################
+
+include_directories("/usr/local/Cellar/pybind11/2.4.3/include")
+#option (USE_PYTHON "Use pybind library" ON)
+
+##### CLion is not recognizing pypart.cc as linked to a target if we use the if option here below in the CMakeFile
+
+#if (USE_PYTHON)
+find_package(pybind11 REQUIRED)  # or add_subdirectory(pybind11)
+
+add_library(pypart MODULE pypart.cc)
+target_link_libraries(pypart PRIVATE pybind11::module part)
+set_target_properties(pypart PROPERTIES
+  PREFIX "${PYTHON_MODULE_PREFIX}"
+  SUFFIX "${PYTHON_MODULE_EXTENSION}"
+  )
+file(
+  COPY ${CMAKE_CURRENT_SOURCE_DIR}/main.py
+  DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/
+  )
+
+#endif(USE_PYTHON)